this post was submitted on 14 Jun 2026
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Cool Rocks

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Minerals are cool, too.

Be gneiss to each other.

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Can anyone help identify these? (imgur.com)
submitted 3 days ago by heydo@lemmy.world to c/cool_rocks@lemmy.today
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These rocks came in a bag of tumbling stones and I have tried using this app, Rock Identifier, to ID them but it have me inconsistent reports. It says it could be Chrysocolla in Quartz, or Aurichalcite, or Quartz, or Agate, or Brochantite.

They are very similar to real other, but two of them have a more bluish tint and the other two have more of a greenish tint. I'd just enough of a difference that I think they could be different, but it wouldn't surprise me if they are the same.

I'm trying to determine their hardness values for tumbling. The problem is, the rocks they have been identified as range from 3 to 7, so I don't want to just throw them in with a batch and hope they don't fall apart.

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