[Jewelry making - Article 00088] - Re: [Orchid] Polishing up oyster shells

[Wayne Emery]

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    The shells of abalone and oyster are the same substance, calcium
    carbonate. It is not a toxic substance. 

    The dust from sawing or grinding shells, just like the dust from
    sawing or grinding rock, can cause short term irritation and long
    term damage to the lungs and eyes. Respiratory protection should
    always be worn in the shop when sawing and grinding stone or shell
    (or coral), but the material itself is simply not toxic. 

    The viscera of abalone can be very toxic, however, maybe that's
    where this myth started? 

Wayne
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