>>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
Coloured diamonds consist of impurities or structural defects that cause the coloration, whilst pure or almost pure diamonds are transparent and colorless. Most diamond impurities substitute a carbon atom within the crystal lattice, called a carbon flaw. The most typical impurity, nitrogen, brings about a slight to rigorous yellow coloration depending upon the sort and focus of nitrogen existing.[36] The Gemological Institute of The usa (GIA) classifies lower saturation yellow and brown diamonds as diamonds in the conventional colour assortment, and applies a grading scale from "D" (colorless) to "Z" (light-weight yellow). Yellow diamonds of high coloration saturation or a distinct color, such as pink or blue, are termed extravagant coloured diamonds and drop under a different grading scale.[36]
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Bold sapphires and sparkling diamonds make fantastic pals. It truly is no shock sapphire sidestone rings are so common.
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碳有數種已知的同素異形體：不定形碳 ，碳奈米泡沫 ，金剛石，藍絲黛爾石 ，蠟石 ，聚合鑽石奈米棒 ，環碳石墨烯、石墨和富勒烯。在熱力學上，金剛石的穩定性低於石墨，可自發轉變為石墨，但常溫常壓下這一轉變的速度很慢，可以忽略不計，因此鑽石得以穩定存在。自然界形成的金剛石一般形成於地球內部高溫高壓的環境，後來被火山噴發等地殼構造運動帶到地表，因此許多金剛石發現在火山附近。現代工業可在高溫高壓下生產金剛石，稱為「合成金剛石」。
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選擇對戒時，除了預算需要考量，日常適配程度、設計風格是否與本身性格合襯、以及其對戒本身的質感都是需要評估的面向。