[Jewelry making - Article 01458] - Re: [Orchid] Who can cut an opal briolette?

[Noel]

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>     I have wondered what a cab would look like if just the back was
>     faceted instead of being flat. 

    Well, of course, then it would no longer be a cab... In order for
    the back to be faceted, it would stick out like, well, a faceted
    stone instead of lying flat. This is called "buff top" and is done
    sometimes. But it is "neither fish nor fowl", and IMO, stones
    generally look best either cabbed or faceted, not in between.
    Incidentally, the o[pposite is done too-- faceted only on top. This
    is called rose cut, and can be very nice, especially on stones that
    are too dark or included for light to bounce *through* them, like
    marcasite or some garnets. 

    A rounded back is pretty common, and again IMO it does not
    accomplish much except to make the stone harder to set. It also
    makes the stone into a magnifying glass (if it is transparent), so
    it becomes very important what the metal under the center of it
    looks like. 

Noel
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