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darn. That's strange.

It looks like an opal because of the way it breaks. It is soft. The rock is a high silica volcanic so I am going to say common opal just because I can't visualize it being anything else.

Apatite? Howellite? I honestly have no idea..

Edited by Bedrock Bob
Does it have an aftertaste?
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Looks like a pretty Chert to me.  I see some banding in it so you could sub classify it as Agate.

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