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 [ 377.75 KiB | Viewed 1940 times ]
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.
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beryl looks to be lifted directly from "Gems: Their Sources, Descriptions and Identification" and includes some fairly outdated information (old ideas about vanadium).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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