[Jewelry making - Article 00521] - Re: [Orchid] Lapis grading system?

[Richard Wise]

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    Lapis is one of the oldest stones known. It was undoubtedly the
    "sapphiros" mentioned in the Bible. Most of it comes from one
    location and trade routes have existed from that location into the
    ancient Middle East dating back 1500BC and further. There are a
    couple of approaches to grading Lapis. Take a look at my book I have
    an entire chapter devoted to connoisseurship in Lapis Lazuli. 

Richard
Secrets Of The Gem Trade
www.secretsofthegemtrade.com
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