[Jewelry making - Article 01322] - Re: [Orchid] Flintstone arrow head

[coralnut]

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Debbie,

    No, flint will NOT hold up to soldering temps. Flint is a variety of
    chalcedony (aka quartz) and will begin to decay at about 700 deg F.
    Flint IS a hard (7 Mohs) and some varieties are extremely tough. That
    is why tools were made from flint. But hardness and toughness are not
    indicators of ability to stand heat. 

    Cheers from Don at The Charles Belle Studioo in SOFL where simple
    elegance IS fine jewelry!
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