Unique rock/mineral. Need help identifying

[Chelle67]

 

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[david680]

Try the forum on here for rockhounds. They can help you out.

 

[tigerbeetle]

Very odd druse crystals (SiO2) on what appears to be something that was once organic or calcified -- wood or coral. It's a piece from a larger formation. Very attractive.

 

[DDancer]

Druzzy quartz bordering on chalcedony from a hydrothermal pocket. Got the first part Tiger The rougher vugs may have had another mineral that has since eroded out~ possibly a carbonate~ that would have been a base rock that the quartz began forming on.