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gemstone help

Posted by adrian Cecc  
gemstone help
June 30, 2012 02:25AM
Hello guys
i was wondering if i could get some help
ok, so heres my problem
last week i went to a rock and mineral show and bought this. It was marked off as blue tourmaline from pakistan, but im quite suspicious about it, personally i believe it is an aquamarine...what are your thoughts about it
any help would be appreciated
thankyou
Attachments:
open | download - photo (1).JPG (753.2 KB)
open | download - photo (3).JPG (466.8 KB)
Re: gemstone help
June 30, 2012 04:19AM
    
It does look like aquamarine, but could you do a couple photo's of the ends to show the shape please?
Re: gemstone help
June 30, 2012 06:23AM
looks like a section of aquamarine crystal markings and inclusions are clearly visible so i would say definitely aquamarine
wolf
avatar Re: gemstone help
June 30, 2012 03:43PM
I think it is tourmaline. Look at the ends of the crystal in the first photo. They apparently have a triangular cross section.
avatar Re: gemstone help
June 30, 2012 04:11PM
From the pics above, it could be one of several things and requires testing with standard tools to sort out which. Crystal form alone won't settle it even were if hexagonal in cross section (I'll guess it's not). Blue Tourmaline is not likely runner in any event.
avatar Re: gemstone help
June 30, 2012 08:09PM
I also think it is tourmaline. Pakistani aquamarine usually have well defined prism faces, even ones medium / low quality.
But I think the origin could be wrong, to me, it looks as Paprok or Lagham (Afghanistan) "paraiba" tourmaline.

Josele



Edited 1 time(s). Last edit at 06/30/2012 09:50PM by Jose Zendrera.
avatar Re: gemstone help
June 30, 2012 08:42PM
    
Another vote for tourmaline, based on the minimal info provided. I agree with Donald's and Hose's observations. A photo of the end as Wayne suggested showing the cross section would be helpful.

regards,
stephanie :))
Re: gemstone help
July 01, 2012 04:18AM
these are the 2 end bits of the crystal
thank you guys so much for all your help
Attachments:
open | download - photo (1) copy 3.JPG (449.3 KB)
open | download - photo (2) copy.JPG (272.8 KB)
Re: gemstone help
July 01, 2012 02:28PM
    
Adrian

The end views definitaly shows it's beryl winking smiley

Wayne
avatar Re: gemstone help
July 01, 2012 04:07PM
I agree, the end-on views definitely support its being beryl.
avatar Re: gemstone help
July 01, 2012 04:55PM
    
Thank you for the new photos, and yes, this shows to be beryl - aquamarine.

regards,
stephanie smiling smiley
avatar Re: gemstone help
July 01, 2012 10:52PM
Are we sure? It's an elongated hexagonal prism and there's some blue colouration. Aquamarine might be likely but, given the indistinct terminations and without testing there are other possibilities. Apatite? Check those ends again... indistinct cleavage? Even Tourmaline can show a hexagonal cross-section sometimes and an indistinct A/B axis cleavage. Testing of hardness, transmitted light spectrum and SG might support a definite opinion. Just my bit of 'quantitative easing'....
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