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 Post subject: IS THIS AN EMERALD?
PostPosted: Fri Jan 31, 2020 12:42 pm 
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Dear experts,

We are about to secure a 57,000+ carat emerald gemstone discovered in Madagascar in 2017 and I would love some expert opinions on whether this is actually an emerald.

I have attached 2 reports,a photo and asked them for a GIA report which they agreed to produce.

Would very much appreciate your feedback,
Trozona


Attachments:
Photo of Emerald (illuminated).jpg
Photo of Emerald (illuminated).jpg [ 377.75 KiB | Viewed 554 times ]
2018 10 26 Beryl (Emerald) Report - University of South Australia.pdf [386.98 KiB]
Downloaded 23 times
2018 10 10 Beryl (Emerald) Report - University of Madras.pdf [826.03 KiB]
Downloaded 13 times
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 Post subject: Re: IS THIS AN EMERALD?
PostPosted: Fri Jan 31, 2020 8:33 pm 
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Good grief.
Let us know when you get results from the Gemological Institute of America.

What you have supplied, IMO, is a whole lot of nothin'.


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 Post subject: Re: IS THIS AN EMERALD?
PostPosted: Fri Jan 31, 2020 8:38 pm 
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Ding, Ding, Ding!!!! Caution advised.

Madagascar is known to produce very large green beryls/ Emeralds. Often low qualities, worth very little relatively.

The way this stone is has been photographed and lit against a black background it is impossible to tell if it is a Beryl, and if so, about its quality.

Will GIA even issue a report on rough stones?


Last edited by 1bwana1 on Sat Feb 01, 2020 9:54 am, edited 1 time in total.

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 Post subject: Re: IS THIS AN EMERALD?
PostPosted: Fri Jan 31, 2020 10:23 pm 
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I think so, about the rough stones....but most gemological instruments were not made to balance 57,000+ carat specimens.


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 Post subject: Re: IS THIS AN EMERALD?
PostPosted: Fri Jan 31, 2020 11:36 pm 
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Sidenote, the "university of madras" description of beryl looks to be lifted directly from "Gems: Their Sources, Descriptions and Identification" and includes some fairly outdated information (old ideas about vanadium). I wouldn't trust a university report to start with, that's not how serious gem ID is done in a commercial setting, but that's a big 'ol red flag. Real gem reports don't reproduce all of the known optical properties of a gem on them, and they sure as HECK don't do thin section studies (not that the pictures look like a real thin section photo anyway).
They also have a photo of what might be a partially sawn section of it? The other pictures look like they could be an iron-colored green beryl, not emerald at all.
Yeah I wouldn't touch this one. Way, way too many red flags.
edit: yeah, looking at the australia study (which describes it as light green and slightly opaque, very bad news!) their methods are ridiculous, at least from a practical standpoint. They might have been using it as a chance to give someone time on their equipment but doing destructive testing on a valuable gem would be extremely dumb when nondestructive methods (raman! visible light spectroscopy! ftir!) would give a definitive answer much more quickly and inexpensively.

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