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indicolite help

Posted by adrian Cecc  
indicolite help
March 03, 2012 10:15AM
hey guys
i was wondering if you could help me with something
last week, i went to the annual rock and mineral show in wollongong, while i was there i came across and bought a piece of indicolite from pakistan from one stand. After a week of looking at it, something tells me its not indicolite but aquamarine or probably of anther stone
the pictures i took are of a really bad quality and I'm sorry about that
that crystal looks like quartz crystals, and has no grooves in the surface of the crystal like a normal tourmaline crystal.
any help would be appreciated
thank you :)
open | download - indi 1.png (173 KB)
open | download - indi 2.png (214.3 KB)
avatar Re: indicolite help
March 03, 2012 11:32AM
You need to get a photo down along the c-axis - the long direction. If it is a fairly even hexagon, it will be aquamarine. If the sides sort of bulge out, it will be tourmaline.

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Re: indicolite help
March 03, 2012 12:17PM
what do you mean by bulge out
its more hexagonal in shape, so does that mean its actually an aquamarine
avatar Re: indicolite help
March 03, 2012 12:41PM
It exist Pakistani tourmaline in this colour but with this poor photos is indistinguishable from aquamarine. Try to make more pictures in focus using macro lens, some from c axis direction as pointed by David. If you can not, attempts to describe crystal shape: lateral prisma faces, termination, bevels, etc.

avatar Re: indicolite help
March 05, 2012 01:14PM
Beryl has a six fold symmetry on the c-axis (long direction). The angles between adjacent faces will be equal. Tourmaline is trigonal and there will be two different angles between adjacent faces (creating a sort of bowed out triangle).

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