I Want To Double Check My Geology. Found A Beautiful Swirled Rock At The Store

MangoPulp

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It was near the fish section at the local pet store. Now that I’m thinking about it, it may be sandstone.

It’s white and red with beautiful swirls and a circular pattern in it. Does the sound like sandstone to anyone else? It’s a bummer because it would’ve looked great in the tank. I’ll work on getting pictures up.
 

A201

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You are describing "Rhyolite". Its an aquarium safe igneous volcanic rock. Fish stores sell it as Rainbow Rock.
 
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