shape
carat
color
clarity

Can these rough gemstones be grandidierite ?

UluGem

Rough_Rock
Joined
Jan 3, 2021
Messages
4
Hi, can please someone give me some advice ?
I have these bluish green stones and I thought they were tourmalines but their specific gravity are between 2.94 and 2.97
The stones are from East Africa.

Thanks
9E0BE26D-F9DC-4AE8-A02E-F64956890B2E.jpeg 1526979A-0AF3-43AA-B163-886F840D6734.jpeg FAE18F05-16D6-4679-8231-6A36AD3749EC.jpeg DB6E7854-262C-4081-A0F9-F9C8BECE8026.jpeg 99C2477F-BC69-437E-BE3F-7E43B51AD6E4.jpeg DAA16462-785F-4E2F-9B3A-CD72B248F678.jpeg
 

JackTrick

Shiny_Rock
Joined
Jul 23, 2019
Messages
440
Agree on not looking like grandidierite. If you hold it in front of polarized light (like a computer screen) and rotate it, what colors do you see?
 

UluGem

Rough_Rock
Joined
Jan 3, 2021
Messages
4
Thanks to all of you for the reply.
Across the C axis the color is completely different and it shows light blue/light olive color.
The other thing is that with the light through the C axis at the other end shows yellowish and bluish-geen all over the stone.

I have other tourmaline stones but these are different.

Thanks for the help.
 
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