Can I get some help identifying this stone/mineral!?

[bsemenoff]

Hey everyone!

I found a few of these stones, which I had assumed it was raw Quartz. I was told it could also be Mica. I live in Alberta, Canada near the Montana border along the Rocky Mountains.

TIA

 

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[Al D]

It is not quartz or mica, it may be calcite

 

[Back-of-the-boat]

It could also be gypsum crystal.

 

[bsemenoff]

Here's a few others I found in the same area.

 

[fuss]

Can you scratch it with your fingernail? if so likely Gypsum.

 

[Clay Diggins]

It's an evaporite. More than likely Selenite. Which means Back of the Boat and Fuss win the kewpie doll. Nice ID guys!