Top Guidelines Of 介指
Top Guidelines Of 介指
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>>十大鑽戒款式推薦！「圓鑽、公主方、祖母綠型」等各式鑽石車工戒指特色整理
Diamond sidestones include more sparkle, and come in amazing choices like sensitive pavé and tapered baguettes.
Benefit For The cash: Based on the measurement and quality of your diamond, vintage rings can cost fewer than freshly crafted ones with equivalent gemstones and products. Many vintage rings also attribute exceptional and intricate patterns that established them besides their fashionable counterparts, and Express a way of heritage and emotional price.
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The manufacturing and distribution of diamonds is basically consolidated during the hands of some critical gamers, and concentrated in traditional diamond trading centers, An important staying Antwerp, in which eighty% of all tough diamonds, fifty% of all Slice diamonds and much more than 50% of all tough, cut and industrial diamonds put together are handled.
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The De Beers corporation, as the earth's premier diamond mining business, retains a dominant place during the market, and it has accomplished so since engagement ring shortly following its founding in 1888 via the British businessman Cecil Rhodes. De Beers is at present the whole world's greatest operator of diamond manufacturing services (mines) and distribution channels for gem-top quality diamonds. The Diamond Buying and selling Organization (DTC) is usually a subsidiary of De Beers and markets tough diamonds from De Beers-operated mines. De Beers and its subsidiaries own mines that generate some 40% of yearly earth diamond production.
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一般的方法是把鑽石按偏黃的程度分為不同的等級，把樣品與已知色級的比色石對比確定，以D級最高，Z最低。
鑽石的色澤會因為化學上的雜質而有所偏差。完全純正的鑽石應該是透明無色的。鑽石偏向不同的顏色會影響它的價值。絕大部分的鑽石都是因為帶有氮原子而偏黃。白鑽越偏黃，價值便越低。但是偏粉紅或藍的鑽石價格卻較高。顏色強烈偏向粉紅或藍的鑽石可能價值連城。
Unsustainable diamond mining in Sierra Leone. Documentary as Portion of the Vrinda Task for Wikibooks In several of the far more politically unstable central African and west African international locations, innovative teams have taken Charge of diamond mines, working with proceeds from diamond gross sales to finance their functions. Diamonds bought through this process are known as conflict diamonds or blood diamonds.[131]