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Classification Archive
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The Purity Classification of Jade
Posted on September 26, 2010 | No CommentsThe factors that affect the purity of jade jewelry include crack, macula and white cotton and so on. Classification Benchmark Level 1 – Can’t see any crack and grey black... -
The Assessment and Classification of Emerald
Posted on March 31, 2010 | 1 CommentColor System and Origin The most specific feature of emerald is the verdant green, so the qualification of the green is the first and foremost factor in assessing the value....
