Please help me identify this stone found in mountain in Colorado

[SinIsJecht]

Hello, I am looking for help identifying this stone that was found in the mountains in Colorado. Tried searching different sites and apps but can't find anything that seems to be accurate. Any help would be greatly appreciated

 

[Odanscoils]

Haven't a clue. Very interesting.

 

[SinIsJecht]

Haven't a clue. Very interesting.

 

[SinIsJecht]

It belongs to my husband's friend and he was convinced it was aquamarine I wish that was the case but it's obviously not!

 

[Geologyhound]

Was it found in the vicinity of Mount Antero?

 

[SinIsJecht]

Yes

 

[SinIsJecht]

Was it found in the vicinity of Mount Antero?

Yes I believe so

 

[north1]

Stab in the dark. Blue/Green Fluorite?

 

[Johnho]

I'm guessing aquamarine too. If fluorite I would expect to see more cleavage planes. It's a beautiful specimen if it is. Can you scratch it with a knife? If not then most probably aquamarine. If you can it's most likely fluorite.

 

[Geologyhound]

Yes I believe so

Mount Antero is a known aquamarine source. Check the hardness as Johnho suggested. Also, take a look down the long axis. How many sides do you see? Aquamarine crystals are hexagonal. The crystal faces may also have vertical striations down the long axis.

 

[Justme]

We have olivine out my way that is green, im no rock hound so thats just a stab in the dark