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Can oral contact with Agate or Jasper cause toxicity?

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asked Dec 23, 2017 by BWRye (120 points)

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I continually collect specimens of these two. A geology professor I know constantly licks specimens. These two rocks are both SiO2. Jasper has iron in it. So do many specimens of agate. Occasional contact has not harmed me.

answered Jan 2 by Weasel (51,190 points)

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