21 Terms
Contributors in Gemstones
Gemstones
克拉
Fashion; General jewelry
arat (as distinguished from Carat) is a measure of the purity of gold. Most gold jewelry is actually made from a gold alloy containing gold and another metal or metals. 18K gold, for example, is 75% ...
建立了的實驗室
Fashion; General jewelry
efers 創建在一個實驗室中，而不是由自然的寶石。創建寶石實驗室通常是相同的材料化學作為自然對應的產生的火焰融合或種植採用水熱法的石英剛玉的個案。 ...
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21 Terms