[Jewelry making - Article 01344] - [Orchid] Working with cinnabar

[bluestar1]

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    Hi All! I have a question about the material Cinnabar. A customer of
    mine gave me two earrings and a ring with carved "cinnabar". Customer
    told me what it was and where she got it. I was doing a repair, but
    first wanted to clean the piece. I will remove the stones from the
    piece before working on it. The problem comes when I used normal
    ultrasonic solution, soaked the piece for about 5 minutes without
    turning the ultrasonic on, and then scrubbed with a toothbrush. The
    "cinnabar" softened and seemed like rubber, indented with my
    fingernail and is essentially ruined. I looked up cinnabar, and it is
    a mineral is it not? Should this have happened? I spoke with the
    customer and she was very unhappy, like I should have known it would
    do this. 

Any help?
Mary Elizabeth
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