[Jewelry making - Article 00912] - Re: [Orchid] Grams per carat - opals question

[Don Rogers]

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    Tom,  there is 0.2 grams per carat or 5 carats per gram. 

    On your second question, you don't sell doublets or triplets by the
    weight, just by the piece.  There are too many variables in the
    construction of doublets and triplets, including  the weight of the
    backings.  Same goes for boulder opal.  These stones sell by their
    "wow" factor.  A really nice stone will sell for much more than a
    not so nice stone.  A big really nice stone will sell for a bunch
    more than a small really nice stone, up to a point.  In other words,
    it will sell for what the buyer is willing to pay and what you are
    willing to accept. 

Don at Campbell Gemstones.

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