Thursday, 31 March 2016

Oppenheimer Blue Diamond up for auction at Christie's Geneva Magnificent Jewel Collection

14.6ct Oppenheimer Blue Diamond up for auction at Christie's Geneva Magnificent Jewel Collection.
We wouldn't mind having this stunner in our "blue" collection.
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Jennifer Stone
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Jennifer Stone Oppenheimer Diamond 253.7 yellow
South Africa
One of the largest gem-quality uncut diamonds in the world, at 253.7 carats (50.74 g).
A number of large or extraordinary diamonds have gained fame, both as exquisite examples of the beautiful nature of diamonds and because of the famous people who wore, bought, and sold them. A partial list of famous diamonds in history follows.
Deliqa Gems Wow, magnificent, Thank you for sharing Jennifer
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Jennifer Stone The history of the stone is hard to find going back in time.
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Deliqa Gems I think that is the case with most large stones because sometime the owners are hesitant to say where they found them.
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Jennifer Stone
Allegedly items that have gone through the auction house and allegedly indisputed
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Deliqa Gems Interesting.
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Jennifer Stone Sorry Im not a jeweller, but it's interesting about blue diamonds have high levels of Boron in the stone. Blue diamonds are only found in a few mines around the world. These mines include the Cullinan mine near Pretoria, South Africa, and the Argyle mine in Australia. Once, blue diamonds were mined in India’s famous Golconda mine as well. I hope it helps.
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Jennifer Stone Intense Blue Diamond with Very High Boron Concentration ...
A natural Fancy Intense blue diamond submitted to the New York lab shows the highest boron concentration ever reported in a natural specimen. They should be able to do this to prove real?
Deliqa Gems Yes concentration of Boron makes it blue. But to prove the stone is natural, you don't need to see how much Boron is there. By examining the inclusions inside the stone and other factors such as spectra specific to diamonds, you can tell whether the stone is natural, synthetic or treated. Same with all gemstones.

In 1989, Kriangkrai Techamong, a Thai worker, stole jewellery and other valuable gems from the palace of Prince Faisal bin Fahd, where he was employed as a janitor.[2] Kriangkrai had access to the prince's bedroom and hid the stolen jewellery in a vacuum cleaner bag at the palace. It included a valuable blue diamond and other gems, which Kriangkrai shipped back to his home in Lampang Province, Thailand.
An investigation launched by a team from the Royal Thai Police, headed by Lieutenant-General Chalor Kerdthes, led to the arrest of Kriangkrai and recovery of most of the stolen jewellery. Kriangkai was sentenced to seven years in prison, but he was released after three years because he confessed to the crime.
The team of Royal Thai policemen under Lieutenant-General Chalor flew to Saudi Arabia to return the stolen jewellery, but the Saudi Arabian authorities discovered that about half of it was fake and the blue diamond was missing.[3][4]

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