[Jewelry making - Article 00580] - Re: [Orchid] Strange color change garnets

[Mark]

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    Clyde, I purchased some rough from Tanzania about a year ago that
    sounds just like the stones that you have.  The main difference was
    the size, all cut under 1.5 carats. 

    I have also seen several Mali garnets that exhibited a nice though
    not dramatic color change.  Many garnets do have a color change,
    though it is not overly strong and I prefer to call it a color shift. 

    There is a lot of color change garnet out there that people just
    don't recognize.  I have cut a couple of stones from Colorado that
    were spessartites.  They had a change from orange to gold.  There are
    even some coming from Tanzania now that have a true red to blue color
    change. 

    To my knowledge all color change garnets have at least one other
    significant garnet component to them, usually spessartite or
    andradite. (Mali garnets are a mix of grossular and andradite). 

    Hope this information helped. 

Mark
www.upstategems.com
Custom cut/designer gemstones


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