New Mineral Named After GIA’s John Koivula
Welcome to the GemologyOnline.com Forum
A non-profit Forum for the exchange of gemological ideas
It is currently Sat Oct 19, 2019 12:02 pm

All times are UTC - 4 hours




Post new topic Reply to topic  [ 6 posts ] 
Author Message
 Post subject: Alexandrite real or lab?
PostPosted: Mon Mar 18, 2019 1:35 pm 
Offline
New to the Forum or The Quiet Type

Joined: Mon Mar 18, 2019 1:00 pm
Posts: 2
Hi,
I am thinking about purchasing an Alexandrite from someone. I'm skeptical even though they have AGSL that looks authentic. I have photos of the gems. Please give me your opinion if the is real or not, and an estimated value.


Attachments:
Screen Shot 2019-03-18 at 11.49.43 AM.png
Screen Shot 2019-03-18 at 11.49.43 AM.png [ 1.96 MiB | Viewed 237 times ]
53478302_2475968165806781_3002572810129244160_n.jpg
53478302_2475968165806781_3002572810129244160_n.jpg [ 72.71 KiB | Viewed 237 times ]
53632158_2475966229140308_7023437440782172160_n.jpg
53632158_2475966229140308_7023437440782172160_n.jpg [ 122.45 KiB | Viewed 237 times ]
Screen Shot 2019-03-18 at 11.49.50 AM.png
Screen Shot 2019-03-18 at 11.49.50 AM.png [ 1.72 MiB | Viewed 237 times ]
Top
 Profile  
Reply with quote  
 Post subject: Re: Alexandrite real or lab?
PostPosted: Mon Mar 18, 2019 3:44 pm 
Offline
Moderator
User avatar

Joined: Mon Apr 02, 2012 9:31 pm
Posts: 3398
Location: North Carolina
I have not heard of AGSL, and the report doesn't look very promising (inclusion of heating?). The color is not atypical for a sri lankan alexandrite (or "alexandrite" depending how you feel about the browner tones). I don't think synthetic alexandrite is grown in this color range but lots of color change glasses exist and I think you are right to be cautious.

_________________
https://www.etsy.com/shop/angryturtle


Top
 Profile  
Reply with quote  
 Post subject: Re: Alexandrite real or lab?
PostPosted: Mon Mar 18, 2019 3:49 pm 
Offline
New to the Forum or The Quiet Type

Joined: Mon Mar 18, 2019 1:00 pm
Posts: 2
Thanks. I'm not a gem expert, so I did not know. I know this color would not be the most desired.


Top
 Profile  
Reply with quote  
 Post subject: Re: Alexandrite real or lab?
PostPosted: Mon Mar 18, 2019 4:55 pm 
Offline
Gemology Online Veteran

Joined: Thu May 12, 2016 2:18 am
Posts: 632
Some things that cause me concern.

1.) The lab in question has a very unprofessional website that seems to both Certify (a term that should not be used) and sell stones.

2.) The stones are not traditional Alexandrite colors. But those standards are not consistent between labs anyway.

3.) On each Cert the origin is different between Brazil, and Sri Lanka even though stones are similar.

3.) on ech Cert the order of the color shift is reversed showing a lack of consistent protocol.

4.) Both Certs contain a statement of heat treatment. Chrysoberyl does not respond well to heat treatments. It is not common, yet both of these stone have it?

I strongly suggest that you do not rely on this documentation of any buying decision.

In any case those are not desirable colors for Alexandrite so value would be low.


Top
 Profile  
Reply with quote  
 Post subject: Re: Alexandrite real or lab?
PostPosted: Mon Mar 18, 2019 5:43 pm 
Offline
Gold Member

Joined: Wed Jan 23, 2013 5:29 pm
Posts: 1017
Location: Paris
All that is related to this AGSL "lab" seems to be a scam.
On our french gemological FB page somebody showed a ruby he bought on ebay with this nice report.
Supposedly a natural ruby, actually a wonderful flame fusion synthetic corundum, or maybe even a piece of glass.
The happy buyer got 3 of them for 40 euros - more or less 45 US dollars.


Attachments:
53430039_1931082827019019_245919562397122560_o.jpg
53430039_1931082827019019_245919562397122560_o.jpg [ 562.76 KiB | Viewed 222 times ]
Top
 Profile  
Reply with quote  
 Post subject: Re: Alexandrite real or lab?
PostPosted: Mon Mar 18, 2019 6:36 pm 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 19858
Location: San Francisco
Sheraphics, I must ask, why do you want to purchase one of these stones?
I presume it is simply the name "alexandrite" as it is certainly not their extraordinary color change.

Compare to the alex offered by David Weinberg at multicolour.com
http://www.multicolour.com/alexandrite/


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 6 posts ] 

All times are UTC - 4 hours


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
Gemology Style ported to phpBB3 by Christian Bullock