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 Post subject: Anyone know this stone or crystal
PostPosted: Wed Sep 29, 2021 6:11 pm 
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I'm curious what stone or crystal this could be


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 Post subject: Re: Anyone know this stone or crystal
PostPosted: Thu Sep 30, 2021 2:21 pm 
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Joined: Sun Oct 16, 2005 12:22 pm
Posts: 21030
Location: San Francisco
I believe a few additional tests are in order.
Can you scratch it with a pen knife, hardness 5.5; a real COPPER penny, hardness 3.5; fingernail, hardness 2.5?
Take care of that thumb nail. We don't want to see any more mishaps.

It you put a couple drops of vinegar on it, does it fizz?

Report back.


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