Quartz, var. Chalcedony, Opal

Black Hills Area
Safford, Graham County
Size: 4.6x3.7x3.5 cm
Largest crystal size: 6mm mm
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This one is actually a big botryoid of chalcedony-opal formed on top of a spray of larger quartz crystals. The best feature though is the bright green fluorescence under SW u-v light.

All prices in Canadian dollars. For payment in US$, deduct 25% or multiply by 0.75.

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