What are some of the advanced techniques used by gemologists to authenticate and appraise valuable stones, and how do these techniques protect consumers and the industry from fraud and misrepresentation?

What are some of the advanced techniques used by gemologists to authenticate and appraise valuable stones, and how do these techniques protect consumers and the industry from fraud and misrepresentation?
Admin 2 days, 21 hours ago in Jewelry & Precious Stones - Other
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