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The Centenary Diamond

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The Centenary Diamond Owned by De Beers

The Centenary is one of the world’s largest modern cut diamond weighing 273.85 carat, measured 39.90 × 50.50 × 24.55 mm, and had 247 facets – 164 on the stone and 83 around its girdle.

The Gemological Institute of America (GIA) (Read here for GIA gemologist class) graded its color as D (Read here for color of Diamond) and its clarity as Flawless.   The rough diamond weighed 599 carats and was found in July 1986 in the Premier Mine in South Africa.

Using the most sophisticated electronic cutting instrument at that time it took the famous master cutter Mr. Gabi Tolkowsky three years to prepare, cut and polish this stone.

Specialized Equipment Being Used To Cut The Centenary Diamond

The equipment used for cutting this stone is specifically designed to hold it securely with pipes to circulate cooling liquid.  The small blue wire is connected to a 9 thermal probe to monitor the temperature generated during the cutting process.

The Centenary Diamond is owned by De Beers Consolidated Mines Limited and was unveiled for public view for the first time in London on May 1st 1991 by De Beers’ Deputy Chairman Mr. Nicky Oppenheimer.

What a stunning beauty in so small a stone….

Citation & Sources : http://en.wikipedia.org/wiki/Centenary_Diamond, http://famousdiamonds.tripod.com/centenarydiamond.html

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I am a Graduate Gemologist trained at the Gemological Institute of America (GIA) in New York City, USA. I hold an MBA degree from Cranfield University, United Kingdom, and a Bachelor degree in Mathematics. My earlier profession was a banker until I found jade in Myanmar (Burma) in the early 90s. I have traveled to the fabled Hpakan Jade mines, and Mogok, the world’s famous rubies and sapphires mines in upper Burma, with my second son. Three of my children are also Graduate Gemologist, GIA, NYC and they deal in diamonds, gemstones and jade. 我是在美国纽约市的美国宝石学院(GIA)接受过培训的宝石研究学家。 我拥有英国克兰菲尔德大学的工商管理硕士学位和数学学士学位。我以前的职业是银行家,直到90年代初我在缅甸接触到玉石。我曾经和我的次子一起去过缅甸上流传说中的哈帕翡翠矿山和莫谷矿山, 莫谷矿山是世界上著名的红宝石和蓝宝石矿山。我的三个孩子都是纽约市GIA毕业的宝石研究学家, 他们专门处理钻石,宝石和玉石.

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