[Jewelry making - Article 00173] - Re: [Orchid] Stabilized Vs. natural turquoise?

[MillsGem]

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Dear Strammy,

    Your contention that a stuck tongue denotes chrysocolla is well
    intended, but unfounded. Yes, chrysocolla can be porous, but seldom
    is, whereas natural Turquoise is typically porous. This is exactly
    why old pawn very often has green Turquoise; the stones have
    absorbed oils from the wearers' skin, thus turning it green. It is
    also the basis for treatment.....low grade Turquoise readily accepts
    adulterants. On a more practical level, it is advisable to soak
    natural Turquoise in water for several days prior to cutting it with
    an oil cooled diamond saw otherwise it will absorb the oil. 

Ron Mills, Mills gem Co. Los Osos, Ca.

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