[Jewelry making - Article 00144] - Re: [Orchid] Ruby Vs. Garnet

[Jeanne Rhodes Moen]

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    One way is if it has any crystal structure to it...ie. Natural
    facets. A ruby has a hexagonal/cylindrical structure and garnets are
    usually more round w/ facets (don't remember exactly how many sides!
    Sorry)....otherwise, ruby is harder than garnet, though not by that
    much. The most certain way to find out is to use a refractometer to
    read the angle at which light bends on entry to the stone. This is
    individual for the different gem types. If you don't have one, ask
    your local gemologist. 

Jeanne

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