Jewellery does the number crunch on some of the world’s most alluring gemstones and treasures.
The diamond is 58 times harder than the next hardest mineral on earth, corundum, from which rubies and sapphires are formed.
The world’s largest diamond mine was discovered in 1979, to become the Argyle Diamond Mine in the rugged Kimberley region of Western Australia.
Petra Diamonds sold a 507-carat diamond for $35.3 million in 2010, breaking a record for the highest price ever paid for a rough diamond. The gem was purchased in a tender by Chow Tai Fook Jewelry Co Ltd in Hong Kong.
This is the tons of gold estimated demand on part of the jewellery industry worldwide in 2011.
The price of the world’s most expensive Barbie ever made. Leading Australian jeweller, Stefano Canturi was commissioned to custom design the doll, which featured an openwork variously cut diamond collar necklace, centering upon a square cut Fancy Vivid purplish pink Argyle diamond, weighing approximately 1.00 carat. ‘Barbie by Stefano Canturi’ sold for a record US $302, 500 to anonymous bidder in 2010, with all profits going to the Breast Cancer Research Foundation.
Natural diamonds were formed approximately three billion years ago, 150 kilometres beneath the earth’s surface.
Marco Polo gave the Arco Valley Pearl to Khubilai Khan, the emperor of China. It weighted 575 carats.
The Sun Drop Diamond is the largest known pear-shaped Fancy Vivid yellow diamond in the world. Sold as part of the Sotheby’s Magnificent Jewels Collection in 2011 for 10 million Swiss francs ($10.7 million), the gem weighs 110.03 carats and has a purity of VVS1, the highest colour grading for a yellow diamond by the GIA.
More than 99 per cent of diamonds are now from conflict free sources and traded under the UN-mandated Kimberley Process. The Kimberley Process requires that each time a rough diamond is traded, it is accompanied by a certificate with a legally binding guarantee that it is from a conflict free source.
Natural colour diamonds, such as champagne diamonds, are extremely rare: the physical conditions that colour a diamond occur very scarcely, so much so that only one in 10,000 diamonds is a natural colour diamond, which is why they’re so treasured!