[Jewelry making - Article 00305] - Re: [Orchid] Odd effect on surface of stones

[Hans Durstling]

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    I've seen that too. In most cases it's a fingerprint and disappears
    if wiped with acetone. 

    Which leads to a story. A few years ago I dropped in to visit and
    drink coffee one evening with my gemology prof. He pulled out a
    stone. "Here, tell me what you think this is." I held it under the
    living room lamp, turned it this way & that & in the process saw the
    selfsame faint curved lines. I said, "I think it's a Verneuil
    synthetic ruby or Verneuil alexandrite simulant, anyway I think it's
    a flame fusion stone because I think I see curved growth lines." He
    was nonplussed; I had hit the jackpot, it was indeed a Verneuil
    synthetic. Only after having noted the same pattern on numerous
    other stones did it dawn on me that what I had seen was a
    fingerprint.

Cheers,
Hans Durstling
Moncton, Canada

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