[Jewelry making - Article 00516] - Re: [Orchid] Frosting of peridots

[andy cooperman]

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    Peridots should not be  pickled.  Sparex and sulphuric acid
    (traditional pickle) will etch some stones, most notably peridot, as
    well as glass,pearl, to some degree and I'm sure other stones. 
    Peridot etches quickly.  I'm not sure if alum will etch... 

Andy

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