Hello,got this ring .its without certification.changes color.Any opinions please ,is it worth getting it certified.
Just as a matter of practicality, this is a nice color change and a very large stone for alex, so I am assuming, until proved otherwise, that this is synthetic. Alex in that size would never be seen commercially. Could be any kind of synthetic, various species are made with color change. Also there is chpiing at facet junctions…not impossible in chrysoberyl, but more unlikely, given that the ring doesn’t look worn, so probably wasn’t worn a whole lot. inclusions look like bubbles except for the one that looks like an insect on the lower right…which could be a chain of bubbles (???). So is it worth it to send this out for a $300 ID when it might come back as a $50 synthetic stone? You know that adage, if it seems too good to be true… -royjohn
Thank you for your reply. I’m taking it to a gemologist today . Fingers crossed . I do have another Alex of 12.5 carats and a few smaller ones with good color change but this is totally different. The color change is purple to red which is not standard Alex.
HI its resembles a synthetic Maybe corundum colour change (sapphire) diagnostics from images photos is not my way but i see double refraction
The Alexandrite beautiful colour strengths almost Demantoid Green Garnet And hot Rasberry pink very nice
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The first one I did check everything it gives refractive index hardness everything of alexandrite . So I guess it’s a synthetic alexandrite cause alexandrite definitely does not have this color change .
It’s diff in diff lights . One loves some colors and hates some… Alexandrite is definitely amazing.
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Nice to see you have GIA Report would of been nice if it said origin brazil have had it valued yet?
I havnt had it valued . I’m in Dubai and have no idea how and where to do it . I’ve been thinking about sending it to gubelin for one more certificate and they do rate gemstones . I’d definitely like to insure it and maybe even sell it. I just don’t know where to start . Any suggestions I’d be grateful.
Unfortunately, the new GIA lab in Dubai only accepts diamond clients. There doesn’t seem to be any current expansion on those services in the near future. https://www.gia.edu/gia-news-press/expansion-with-state-of-the-art-laboratory-dubai
And it looks quite expensive, too! 
IGI has a lab there: Google Search
Cheers!
-Troy
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monday i go to igi
Hi Nirmala,
Curious if you have an update on the unknown Alexandrite. 
Also very curious about your experience with the IGI lab there.
Cheers!
Troy
Hi,i did go not to igi but a lab called gulf gem lab.Took both the stones ,one certified alexandrites and the other one for verbal only and if it turns out to be a good stone i thought id get it certified.That stone he gave a verbal saying its a synthetic alexandrite.i asked him if its a synthetic color changing sapphire cause those are the most common alexandrite simulants.He said its a synthetic alexandrite.
Im still planning to get another opinion though.IGI dubai does not answer calls.im just going to have to go there personally.
With 55 years of international gemstone and gemology experience, I would say 99% probability it is synthetic flame fusion color change sapphire, a common imitator of alexandrite for nearly 100 years.
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IGI, like some other large labs, may not respond to telephone calls and prefer initial communication via email. Have you attempted to email the lab? dubai@igi.org
Cheers!
Troy
I also have to ask if it is worth getting a second opinion, snce you received a verbal acknowledgment that the unknown stone is synthetic. The gemologist may have provided an answer without charging you for the information.
Attempting to get the stone valued now may not be worth the cost. The stone is fairly large but it seems to have the color-change behavior typically displayed in synthetic color-change sapphire, as Mr. Bergman (@jbergman) pointed out.
Testing the secondary stones to see if they are diamond or a simulant may help. Unless you already have one, you can purchase a decent diamond tester for less than the cost of a valuation report.
Cheers!
-Troy
i guess so cause its too good a color change for it to be real.
It’s definitely a synthetic sapphire…its too good to be true…The article is really informative.