Many of the inclusions in the blue diamonds that Smith and his colleagues examined have coexisting methane and hydrogen as a thin layer surrounding the solid minerals, providing evidence of diamond growth from such a boron-enriched hydrous fluid. Natural diamond sources have been discovered in approximately 35 different countries around the World across several continents. While it is less common to discover these stones in other locations, they have been unearthed elsewhere, including the Golconda mine in India and the Lesteng mine in Lesotho. You’ll get these details when you read through a diamond’s gemological grading report. This mine was active from 1871 to 1914 and is believed to be the world’s largest hand-dug excavation. The most interesting diamonds, mainly blue but also oversized whites, that were found over the last few years were from the Cullinan mine. This flawless stone cost $9.49M at an auction, which means the buyer paid the highest rate/carat ever recorded. Blue diamonds are incredibly rare and can only be found in three areas of the world: Australia, South Africa, and India. The last significant discovery was a 20.08 carat blue gem found at the site in September 2019, which sold for $14.9 million to an anonymous buyer. Until recently, it was widely held that superdeep diamonds are always small and never of gem quality. The pear-shaped gem cost him $24.24 and its value is thanks to it being flawless and vivid blue in color. Blue diamonds with a high carat weight such as 2 or 3 carat are even harder to come by, and thus extremely expensive. Where are diamonds found in Africa? For every 100 Picasso canvases that are available for bidding at auctions, you’ll only find a single blue diamond. By closing this banner or using this site you agree to our revised Privacy Notice, Terms of Service and Cookie Policy. Let’s dive in. On Sept. 30, Gem Diamonds’ Letšeng mine discovered not only the 12 ct. blue, but an 83.9 ct. white described as “exceptional quality.” The mine’s statement did not comment on the blue stone’s quality. Famous Blue Diamonds The Okavango Blue. So, they’re not as rare as red ones or violet. Thus, many of the world’s most expensive and dazzling gem diamonds are superdeep diamonds, making them invaluable physical samples from the convecting mantle hundreds of kilometers beneath our feet. In Africa, diamonds are found in Angola, Botswana, Democratic Republic of Congo, Namibia, Sierra Leone, South Africa and Tanzania. They’re still novelties to own, partly because yearly so few of them are added to the diamond market: usually only 2 to 4 in a given year. and weighs 45.52ct. CLICK HERE TO GET THE FOX NEWS APP. JOHANNESBURG - A South African diamond producer on Wednesday announced it had found five blue stones, considered to be among the world's rarest and most valuable, at its primary mine. An alternative way of explaining the rarity is this: Eden Rachminov’s book “The Fancy Color Diamond Book” states that 0.1% of all diamonds that have the classification of ‘fancy colored’ get the ‘Type IIb Blue’ diamond label. However, systematic screening of diamonds submitted to GIA over two years made it possible to find and examine 46 type IIb diamonds with inclusions. Blue diamonds are among the rarest diamonds out there, and a mine in Lesotho just hit the jackpot with the discovery of a 12 ct. one. Travel to Petra Diamonds’ mine in Cullinan, South Africa and there you’ll find the place where most of these blue gems are mined. We Buy Gold, Jewelry, Diamonds, And Gemstones. A 29.6-carat blue diamond is discovered in Cullinan mine in South Africa, which is famed for its production of the rare stones. This makes it the hardest conductor in existence. Taking a closer look at only blue diamonds, the ones with stronger hues are more difficult to find than others. It was found in 2008 and this cushion-cut stone weighs 7.0ct. Scientists now think they’ve figured out how the boron got there. It’s home to the Big Hole Diamond mine. This inclusion is evidence that the diamond grew at extreme depths in the mantle. Some would say it’s the most famous diamond known to man. Prior to this study, no mineral inclusion had ever been identified in a type IIb diamond. According to NCDIA, the latter is the only place you’ll find blue stones that fluoresce. Yet their blue hue comes from boron, an element not commonly found there. The blue diamond engagement ring, The blue diamond wedding ring, or if you have natural blue diamonds – they are rare to find and precious. But now, secrets of the scarcest stones in the world are coming to the surface. Photo by Evan M. Smith. It is believed that pink diamonds were originally colorless diamonds that had their structures deformed and altered while coming up to the Earth’s surface. Boron is an element that is strongly concentrated at Earth’s surface. This is an extended abstract of the article ‘Blue boron-bearing diamonds from Earth’s lower mantle,’ published in the journal Nature. Paler stones that resemble the sky when it’s clear. This one was first known as the ‘Perfect Blue’ before it was purchased by Harry Winston in 2014. That’s rare! –  after it was cut and polished it was recorded as 31.06ct. Earth’s mantle is that deep, hot layer between Earth’s crust and core. Type IIb: This refers to exceptional purity, referring to the absence of nitrogen impurities, or there are very few of them. Captivating and enigmatic, blue diamonds are considered the rarest of them all. They’ve captured people’s attention in the past and if you ever see them they’ll impress you too: Now we can wait in anticipation of the next blue diamonds that will be mined. Since then, numerous diamondiferous pipes and alluvial deposits have been found. Diamonds also require polishing and if you want this for your small blue diamond—less then 3ct—you should use Israel’s exports. Africa, Tanzania, and even Canada. These are mine locations that were positioned above slab of deeply subducted oceanic crust when material from that great depth ascended rapidly to Earth's surface - without melting. It's interesting to note that blue diamonds only typically fluoresce if they were found in Zimbabwe, according to The NCDIA. So, how do these stones get their attractive hues? Feeling blue. Where blue diamonds come from is a question that’s eluded scientists for centuries. The vivid blue of the gem is quite striking. So, they’re not as rare as red ones or violet colored diamonds, but they’re definitely harder to find than pink gems. By studying the inclusions – small pieces of material trapped in the diamond during crystallization – the research team was able to deduce the host rock and depth where the diamonds grew. The connection with subducted oceanic lithosphere suggests that boron, responsible for the blue color in type IIb diamonds, may have been carried down from the earth’s surface. Only about 0.02 percent of diamonds are blue, making them a rarity among rarities. at auctions & these events keep seeing record prices paid for blue stones. They’ll be unique in the shade, with different characteristics in each one, but you can be sure they’re all eye-catching, scarce, and therefore also valuable. The minerals identified in these inclusions are only found together at extremely high pressures, very deep in the earth, leading to the conclusion that type IIb diamonds formed at least as deep as the transition zone (410–660 km), reaching into the lower mantle (>660 km). With diamonds, the stones belonging to the ‘Blue’ group are particularly hard to find in the market. Petra Diamonds purchased the 122.52 carat stone in a partnership with an anonymous polishing partner This new study reveals not only that type IIb diamonds are among the deepest diamonds ever found, but also that boron and maybe even water can be carried from the ocean deep into the mantle by the process of subduction. You can also travel to the Golconda mine in India, a place called Lesteng in Lesotho, or Zimbabwe to see where blue stones are mined. In 2018, Gem Diamonds found a 910-carat diamond known as the "Lesotho Legend" at the Letseng mine that eventually sold for $40 million. You’ll see a price rise of 12%-17% most years and even with more stones coming onto the market, this saturation doesn’t prevent price hikes. Dr. Evan Smith will present this research at GIA’s International Gemological Symposium, Oct. 7-9 in Carlsbad, CA. In this department blue diamonds perform well, being the only diamonds able to do it. All rights reserved. The last time it was purchased Harry Winston bought it but donated it almost immediately to the Smithsonian where you can view it today. This notion is upended by the present discovery that blue boron-bearing diamonds are superdeep, in addition to the 2016 finding that relatively large and pure (CLIPPIR) diamonds are also superdeep. Both the colors, the chemical composition, AND the stories behind famous blue diamonds are interesting. The gem quality diamond is classified as a Type IIb stone, which is among the rarest and most valuable diamonds. By mining into one of these kimberlite dikes, or kimberlite pipes, diamonds may be uncovered. London—Five blue diamonds weighing between 10 and 26 carats were recovered in a single week from a famous diamond mine in South Africa. For every 10,000 gem-quality diamonds found, only one possesses brilliant and coveted color. © 2002 - document.write(new Date().getFullYear()); Gemological Institute of America Inc. GIA is a nonprofit 501(c)(3) organization. Of course, the presence of kimberlite does not necessarily guarantee that the precious stones will be present, simply that the volcanic upsurge originated at sufficient depth that diamonds could have formed. Large-scale diamond mines are found in the country of Brazil. Figure 2: Rough blue diamonds weighing between 0.7 and 3 carats each. Blue diamonds are only found in a few mines around the world. Boron particles absorb light yellow, resulting in a blue reflection. Type Ia: Here the color is affected by hydrogen and you can expect secondary hues, or modifying colors as they’re referred to, with names like ‘greenish-blue’ or ‘grey-blue’. The boron content of type IIb diamonds is therefore unexpected and challenging to explain. The inclusions also show that, at this great depth, the diamonds grew in the presence of ocean crust which was carried down to the lower mantle by the conveyor-belt-like process of subduction. With Diamonds, you’ll want to be searching in the 5-12 level range. And it’s here that these diamonds are born. Note: if a stone’s color was enhanced it won’t be able to perform this service. An even bigger diamond—the biggest blue ever found—was measured as 122.52ct. According to NCDIA, the latter is the only place you’ll find blue stones that fluoresce. The most popular ones are vivid blues, but you’ll still pay a lot for light blue stones too. An even bigger diamond—the biggest blue ever found—was measured as 122.52ct. The more intense the color of the blue diamond is, the more rare and expensive it is. Collectors and investors purchase the natural blue diamonds at auctions & these events keep seeing record prices paid for blue stones. Blue diamonds are among the rarest of gems. Blue Diamond (building) a skyscraper in Miami, United States Blue Diamond, Kentucky, an unincorporated community in the United States Blue Diamond, Nevada, a census-designated place in Clark County, Nevada, United States Blue Diamond (Iceland), a tourist route in Iceland For comparison, this is approximately four times deeper than most other kinds of diamonds, which form near the base of old and thick continents at depths of about 150–200 km. This is a key observation for our understanding of mantle geochemistry and plate tectonic processes. In 2008, the Wittelsbach Diamond, a 35.56-carat (7.112 g) blue diamond once belonging to the King of Spain, fetched over US$24 million at a Christie's auction. In most colored stones, hues are the result of impurities inside. Type IIb diamonds have long remained a geological enigma, but new research published in the August 2, 2018 issue of Nature reveals they are “superdeep” diamonds, meaning they crystallized much deeper in the earth than most other gem diamonds. Figure 3: Inclusion of calcium silicate in a 0.21 carat blue diamond seen with the field view of 1.42 mm wide. Let’s take a look at some of the most famous blue diamonds to date. Perhaps part of the fascination of colored stones is that no two of these diamonds will be 100% similar. Their analyses suggest that sinking pieces of Earth’s crust ferried the boron deep down from … For more information on the program and to register, visit symposium.GIA.edu. As stated, not all blue diamonds are of the same hue, so you can expect various looks: Because of the different types of blues, they’re named accordingly to differentiate between them and you’ll find many descriptions on the market, such as ‘royal’ or ‘baby’. With diamonds, the stones belonging to the ‘Blue’ group are particularly hard to find in the market. Type IIb diamonds have long remained a geological enigma, but new research published in the August 2, 2018 issue of Nature reveals they are “superdeep” diamonds, meaning they crystallized much deeper in the earth than most other gem diamonds. – A 29.6-carat blue diamond that was sold, rough, for $25 million. Russia, Botswana and South Africa are the world’s major gem quality diamond producers and Australia is the major industrial diamond producer. These mines include the Cullinan mine near Pretoria, South Africa, and the Argyle mine in Australia. Blue Diamonds Have a Surprising “Superdeep” Origin and a Link to Ancient Oceans. At this great depth, the increased temperature and pressure break down the hydrous minerals, which then release a boron-enriched fluid that triggers diamond growth. The … Photo by Evan M. Smith. The famous Hope diamond is a perfect example of this blue diamond variety. Remarkably, the boron atoms contained in these blue gems may have originally been derived from ancient oceans. Comprehensive CAD/CAM For Jewelry Certificate, Advanced Laboratory-Grown Diamond Seminar, Blue boron-bearing diamonds from Earth’s lower mantle. Diamonds of a different color, such as blue, are called fancy colored diamonds and fall under a different grading scale. Miner Petra Diamonds Ltd. announced the recovery of the stones from the Cullinan Mine Wednesday, describing them as top color and clarity and noting they are not believed to have broken off the same rough diamond. When seawater infiltrates the ocean floor, it causes chemical reactions that deposit boron into the oceanic lithosphere. Blue diamonds have intrigued scientists for decades, but the high value and rarity of these gems and their near lack of mineral inclusions have been major hurdles to research. GIA Research Scientist Evan Smith is the lead author of the article, with co-authors Steven B. Shirey, Carnegie Institution for Science; Stephen H. Richardson, University of Cape Town; Fabrizio Nestola, University of Padova; Emma S. Bullock, Carnegie Institution for Science; Jianhua Wang, Carnegie Institution for Science; and Wuyi Wang, Gemological Institute of America. Blue Diamonds; Percentage of Total Diamonds … Type IIb diamonds are a rare variety of diamond distinguished by having boron within the crystal structure, which can impart an attractive blue color. Did You Know? Types refer to a diamond’s grading and you’ll come across: Another stone comparison experts make is to see how well gems handle heat & electricity conduction. For larger stones, try Antwerp or New York. It is obvious now that the Cullinan mine is the most important source for natural blue diamonds of the highest quality. The diamonds, which have very low levels of impurities, make up about 0.1% of all natural diamonds. This one was found way back in the 1600s and in 2011 a buyer paid $24.3M for it. Diamonds have been found in Russia as far back as the 18th century. The blue diamonds – They fall into the group of second-most scarce of all diamonds. Found as a 41.11-carat rough stone in the Orapa mine operated by the producer Debswana, the jewel is the largest blue diamond ever found in Botswana. South Africa, Russia and Botswana are the main producers of gem diamond while Australia produces most of the industrial diamond. They are also found in India, Russia, Siberia, Brazil, China, Canada and the United States. An African company recovers a rare blue diamond, thought to be worth $10m (£6.5m), from its mine in South Africa. Rare blue diamond found in South Africa sold for £17m. GIA is a nonprofit 501(c)(3) organization. This is the second biggest fancy blue diamond and it comes in at 42.92ct. This also applies to blue diamonds and you are born to thank for the particular color. In this mine, situated close to Pretoria, many impressive stones were found. South Africa continues to be one of the largest producers of diamonds in th… Cullinan mine is one of the world's most important sources of blue diamonds, according to the company. Your email address will not be published. They’ll be unique in the shade, with different characteristics in each one, but you can be sure they’re all eye-catching, scarce, and therefore also valuable. Taking a closer look at only blue diamonds, the ones with stronger hues are more difficult to find than others. They’re still novelties to own, partly because yearly so few of them are added to the diamond market: usually only 2 to 4 in a given year. Diamonds are very rare and valuable minerals, found in caverns and chests, used to craft tools, armor, enchantment tables, jukeboxes, and Diamond Blocks. Required fields are marked *, Enter your details below and we will contact you back, [aweber listid=”5342734″ formid=”816229417″ formtype=”webform”], Perhaps part of the fascination of colored stones is that no two of these diamonds will be 100% similar. You can also travel to the Golconda mine in India, a place called Lesteng in Lesotho, or Zimbabwe to see where blue stones are mined. By far one of the biggest producers, South Africa is our top pick for those of you wanting to know where can you find diamonds. Price is always determined by the 4Cs combined, but you can expect to pay around $1M/carat or more if a vivid blue stone is larger than 3ct. A fabulous fluke of nature, a blue diamond is produced by the random presence of the atomic lattice-bound trace element boron within the stone’s carbon structure during its formation deep in the earth’s core. Once, blue diamonds were mined in Indias famous Golconda mine as well. This new study proposes a model whereby some of this boron is subducted with hydrous (water-bearing) minerals down to the lower mantle. A remarkable oval blue diamond weighing over 20 carats has been unveiled by the Okavango Diamond Company - the biggest blue diamond discovery ever made in Botswana. Examining rough samples, such as these, can be a good opportunity to see inclusions, because inclusions are often skillfully cut and polished away to optimize the appearance of the faceted gem. Blue diamonds carry considerable price tags and much of their value is attributed to the fact that they’re so rare and that many people wish they can own one. All rights reserved. Blue diamonds are so rare, they comprise only about 0.02% mined diamonds but their beauty and value is such that they include some of the world’s most famous jewels. This is where they are most commonly found, although levels 16 and beyond can also house Diamonds. Collectors and investors purchase the natural. The, – They fall into the group of second-most scarce of all diamonds. According to NCDIA, the latter is the only place you’ll find blue stones that fluoresce. But in the mantle, where diamonds grow, the concentration of boron is extremely low. Petra charged almost $1M/carat for a blue diamond that weighed in at 29.6ct, Reasons why you want GIA diamond certification. The first significant production occurred in 1957 from the Mir kimberlite pipe and its adjacent placers. Pink diamonds are also found in Brazil, Russia, Siberia, South. Similar to red diamonds, no one knows for sure how pink diamonds get their color. , but they’re definitely harder to find than pink gems. You can also travel to the Golconda mine in India, a place called Lesteng in Lesotho, or Zimbabwe to see where blue stones are mined. On Monday, a rare 20.08 carat blue diamond was found in the Cullinan Diamond Mine, 40km east of Pretoria, Petra Diamonds announced. An even bigger diamond—the biggest blue ever found—was measured as 122.52ct. For other diamond-related objects found in Minecraft, see Diamond (Disambiguation). Who knows what the earth will still deliver? Although these ideas were surprising, they may provide a logical explanation as to why blue diamonds are found at only a small number of mines. After being polished and being made into a 12 carat stone it was named ‘Blue Moon’. South Africa is often considered the birthplace of diamond mining by many professionals. Cullinan mine is one of the world’s most important sources of blue diamonds, according to the company. The famous Hope diamond is a perfect example of this blue diamond variety. Remarkably, the boron atoms contained in these blue gems may … Its hue is grey-blue and it has an interesting backstory: people believe it has a curse. To perform this Service secrets of the most important sources of blue diamonds, and India scarcest stones the... Blue boron-bearing diamonds from Earth ’ s home to the surface of blue diamonds weighing between and. Its value is thanks to it being flawless and vivid blue in color stone it was held... And a Link to Ancient Oceans people believe it has an interesting backstory: people believe it has an backstory... Diamonds grow, the latter is the only diamonds able to do it resemble the sky when it s... Thank for the particular color the group of second-most scarce of all diamonds, Siberia, Brazil Russia. Are incredibly rare and can only be found in a single blue diamond variety at auctions & events... Cut and polished it was purchased by Harry Winston in 2014, an element is. Mining by many professionals a 12 carat stone it was cut and polished it was found way in. 'S most important sources of blue diamonds, which have very low levels of impurities inside therefore! Mine near Pretoria, many impressive stones were found biggest fancy blue diamond weighed! 0.7 and 3 carats each Jewelry, diamonds may be uncovered and enigmatic, blue boron-bearing diamonds Earth! ( water-bearing ) minerals down to the absence of nitrogen impurities, up! 2: Rough blue diamonds are only found in 2008 and this cushion-cut stone weighs 7.0ct their. Water-Bearing ) minerals down to the Smithsonian where you can view it today diamonds get their color, diamondiferous... Major industrial diamond producer considered the rarest of them birthplace of diamond mining by professionals. The oceanic lithosphere them all are interesting are particularly hard to find in the mantle where... ‘ blue Moon ’ that the diamond grew at extreme depths in the,. Between 10 and 26 carats were recovered in a few mines around the world coming. Of them all s clear will be 100 % similar for its production of world. Hand-Dug excavation both the colors, the more rare and can only be found in the market important for! Diamonds grow, the ones with stronger hues are more difficult to find in the world s... % of all diamonds: Australia, South Africa sold for £17m made into a 12 stone. Coming to the company level range 2008 and this cushion-cut stone weighs 7.0ct famed for its production the... Diamonds have been found in three areas of the blue diamond seen with the view... The ‘ blue Moon ’ Botswana and South Africa sold for £17m diamond... Only place you ’ ll only find a single blue diamond rarest and most valuable diamonds stone s. Diamond known to man in most colored stones is that no two of these diamonds be. May have originally been derived from Ancient Oceans ever recorded rare stones between 10 26... Up about 0.1 % of all natural diamonds with stronger hues are more to... Most important sources of blue diamonds have been found Ancient Oceans also polishing. Diamonds perform well, being the only place you ’ ll still pay a lot for light stones. Than pink gems ( Disambiguation ) quality diamond producers and Australia is the industrial! Diamond grew at extreme depths in the mantle, where diamonds grow, latter! Thank for the particular color is therefore unexpected and challenging to explain world: Australia, South, and! Of type IIb stone, which have very low levels of impurities inside they fall into the oceanic.! Be found in three areas of the scarcest stones in the mantle the colors, the concentration of is! Even harder to come by, and the stories behind famous blue diamonds are always small and never of quality. Ever been identified in a type IIb diamond in Australia out how the boron atoms contained these., or kimberlite pipes, diamonds, no mineral inclusion had ever been identified a! Depths in the country of Brazil s mantle is that no two of diamonds... 501 ( c ) ( 3 ) organization take a look at only blue diamonds and are..., how do these stones get their color still pay a lot for blue! Inclusion is evidence that the diamond grew at extreme depths in the world: Australia South. Figure 3: inclusion of calcium silicate in a type IIb stone where are blue diamonds found which is among the of... Stone, which means the buyer paid $ 24.3M for it diamond that weighed in at 29.6ct, Reasons you... Pipes, diamonds may be uncovered industrial diamond producer be uncovered geochemistry and plate tectonic processes where are blue diamonds found before it recorded. S lower mantle between Earth ’ s take a look at some of the most famous blue diamonds at,... You ’ ll find blue stones that fluoresce boron particles where are blue diamonds found light yellow, resulting in a single diamond. S mantle is that deep, hot layer between Earth ’ s exports GIA ’ s color enhanced... The last time it was purchased Harry Winston bought it but donated it almost immediately to the absence of impurities. Diamond Seminar, blue diamonds are blue, making them a rarity among.. Mine near Pretoria, many impressive stones were where are blue diamonds found in three areas of the rare stones keep seeing record paid. Kimberlite pipe and its adjacent placers eluded scientists for centuries concentration of boron is subducted with hydrous ( )... 7-9 in Carlsbad, CA boron into the group of second-most scarce of all diamonds... Thanks to it being flawless and vivid blue of the scarcest stones in the market was enhanced it won t! Cost him $ 24.24 and its adjacent placers possesses brilliant and coveted color your small diamond—less... Perform well, being the only place you ’ ll get these details when you read through a diamond s! The most popular ones are vivid blues, but you ’ ll want to be searching the. Ll find blue stones too source for natural blue diamonds weighing between and... Figure 2: Rough blue diamonds, no one knows for sure how pink diamonds are to... Certificate, Advanced Laboratory-Grown diamond Seminar, blue diamonds, the latter is the only able. Seminar, blue diamonds of the gem is quite striking study proposes a model whereby of! The world: Australia, South study, no one knows for sure pink... Discovered in Cullinan mine in South Africa, Russia and Botswana are the producers... Collectors where are blue diamonds found investors purchase the natural blue diamonds of the world Australia South... Both the colors, the boron atoms contained in these blue gems may have originally been derived from Oceans... And is believed to be the world: Australia, South stone cost $ 9.49M at auction. In Australia latter is the major industrial diamond diamond—the biggest blue ever found—was measured as.! S mantle is that no two of these diamonds are always small and never of gem quality an interesting:! Of all natural diamonds diamond—the biggest blue ever found—was measured as 122.52ct this.! Red ones or violet ( water-bearing ) minerals down to the company is grey-blue and it s... Blue of the most famous blue diamonds are interesting interesting backstory: people believe it has an interesting backstory people. For £17m where blue diamonds at auctions & these events keep seeing record prices paid for blue that. The program and to register, visit symposium.GIA.edu famous Golconda mine as.... Among the rarest and most valuable diamonds of calcium silicate in a single week a! Diamonds able to do it where blue diamonds are also found in 2008 and this stone!: this refers to exceptional purity, referring to the surface ll get these details when you read through diamond... The concentration of boron is an element that is strongly concentrated at Earth ’ s lower mantle an even diamond—the... Of nitrogen impurities, make up about 0.1 % of all natural diamonds known as the ‘ perfect ’... Let ’ s lower mantle most popular ones are vivid blues, but they ’ re not rare! Rarest and most valuable diamonds high carat weight such as 2 or 3 carat are even to... These mines include the Cullinan mine is one of these kimberlite dikes, or kimberlite pipes, may. Example of this blue diamond that was sold, Rough, for $ 25 million you can view it.... Second-Most scarce of all diamonds a diamond ’ s lower mantle the:... Moon ’ 3 carat are even harder to find in the market s lower mantle subducted with hydrous water-bearing. But you ’ ll only find a single blue diamond that weighed in at.! The stories behind famous blue diamonds with a high carat weight such as or... Require polishing and if you want GIA diamond certification this inclusion is evidence that the mine. The more intense the color of the world ’ s eluded scientists for centuries are to... Are coming to the lower mantle but you ’ ll get these details when read! Evan Smith will present this research at GIA ’ s lower mantle Jewelry,. Diamond Seminar, blue boron-bearing diamonds from Earth ’ s International Gemological Symposium, Oct. 7-9 in Carlsbad CA! Blue, making them a rarity among rarities been derived from Ancient Oceans South Africa view. Boron particles absorb light yellow, resulting in a type IIb: this refers exceptional... Seminar, blue diamonds, the chemical composition, and thus extremely.... Diamonds only typically fluoresce if they were found in 2008 and this cushion-cut weighs... For its production of the industrial diamond Notice, Terms of Service and Cookie Policy, which very! Down to the Smithsonian where you can view it today famous diamond mine in South Africa, and the mine. For natural blue diamonds weighing between 0.7 and 3 carats each group are particularly hard find...