Basalt - “Chrysanthemum Stone”?

[BridgetownTreasures]

Chrysanthemum stone seems to be an informal ID that brings varied results, some of which look a lot like this guy...,

 

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[ToddsPoint]

Google "diabase porphyry" and see what turns up. I like carving that stuff. Gary

 

[BridgetownTreasures]

Google "diabase porphyry" and see what turns up. I like carving that stuff. Gary

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Beautiful, Gary!