ashleeannajones
off to a rocking start
Member since December 2023
Posts: 23
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Post by ashleeannajones on Mar 13, 2024 20:31:07 GMT -5
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chris1956
fully equipped rock polisher
Member since July 2022
Posts: 1,253
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Post by chris1956 on Mar 13, 2024 20:44:54 GMT -5
There are probably better experts on here, but a lot of quartz that has been rounded in water has a "skin" of yellowish color and the inside is white. Where did you find it? Kind of has the look of maybe being chalcedony. I bet it would polish real nicely.
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realrockhound
Cave Dweller
Member since June 2020
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Post by realrockhound on Mar 13, 2024 21:52:22 GMT -5
Chalcedony
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Post by velodromed on Mar 13, 2024 22:59:12 GMT -5
I find a lot of similar rocks here in central Texas. It’s a chunk of chalcedony, which is basically the same stuff agates are made from (crypto/micro crystalline silica), just without the complexities and banding. The ‘skin’ is oxidized minerals in the rock, which gives it some surface color. Try cutting the rock into mini slabs and then polish them in your rotary tumbler. I’ve done a bunch of that type thing. They look really cool once polished and make good palm stones.
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RWA3006
Cave Dweller
Member since March 2009
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Post by RWA3006 on Mar 13, 2024 23:06:01 GMT -5
Chalcedony with an oxidized rind, as others have pointed out. I've found a lot of similar examples in Wyoming and Utah.
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