[Jewelry making - Article 00299] - Re: [Orchid] Using the term semi precious gems

[leonid surpin]

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>     All emeralds, high or low quality, can be easily broken,
>     regardless of the type of treatments used on them 

    This is not accurate. 

    Emerald is a beryl coloured by chromium. If crystal is not fractured,
    it is almost as durable as aquamarine. "Jardin" refers to presence of
    fingerprints, included crystals, and 3 phase inclusions
    (characteristic of colombian emeralds). These inclusions do not
    degrade structural integrity of the gem, unless fingerprint is only
    partially healed. It is the fractures, which are concealed via
    different mean, that makes emerald vulnerable to impact. 

Leonid Surpin
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