[Jewelry making - Article 00197] - [Orchid] Coolants - keeping gemstones cool

[Pauline Warg]

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    This is an age old method of keeping gemstones cool while sizing
    rings. Take a potato, yes, a fresh potato, slice off part of it to
    make a flat surface on top and bottom. Leave as much potato as
    possible. Cut a slit or carve a small area out, depending on size of
    stone. Do this dead center so there is as much potato as possible on
    sides and bottom. Bury the stone into the slit leaving only the area
    to be soldered protruding. There is a great deal of water in a dense
    material that will keep the stone cool. You still need precise heat.
    I have soldered emerald and opal rings this way. Then you can plant 
    what's left of the potato !


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