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Found near the Sawtooths in Nevada on a hilltop that had lava flow. Fluoresces an orange color.

I'm guessing fluorite exterior with calcite crystals on the inside?

2016-06-21_08-31-56_887.jpg

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I agree with d_day, but check it with some hydrochloric acid (or warm vinegar) and a hardness test using a glass plate.  What fizzes is calcite and what scratches the glass plate is chalcedony (microcrystalline quartz).

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  • 3 weeks later...
On 6/22/2016 at 4:40 PM, GeoJack said:

Thanks Home, may have to have someone make something out of a section of it.

 

give me a call

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