January 24 Through February 4—TUCSON, ARIZONA: Annual show
Welcome to the GemologyOnline.com Forum
A non-profit Forum for the exchange of gemological ideas
It is currently Tue Mar 19, 2024 7:19 am

All times are UTC - 4 hours




Post new topic Reply to topic  [ 4 posts ] 
Author Message
 Post subject: Separating Kashmir and Madagascar Sapphire
PostPosted: Tue Jun 01, 2021 10:29 pm 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 21600
Location: San Francisco
My son was recently on the hunt for the perfect engagement ring sapphire.
He found an awesome stone cut by John Dyer. Untreated Madagascar with some zircon inclusions.
Read on.



Top
 Profile  
Reply with quote  
 Post subject: Re: Separating Kashmir and Madagascar Sapphire
PostPosted: Wed Jun 02, 2021 7:30 pm 
Offline
Moderator
User avatar

Joined: Mon Apr 02, 2012 9:31 pm
Posts: 4015
Location: North Carolina
Congratulations to your son!
These madagascan sapphires are really cool--anything that can be easily confused for Kashmir is a win in my book.

_________________
Rough and cut classic and exotic synthetic gems:https://store.turtleshoard.com


Top
 Profile  
Reply with quote  
 Post subject: Re: Separating Kashmir and Madagascar Sapphire
PostPosted: Wed Jun 02, 2021 11:51 pm 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 21600
Location: San Francisco
What I found most interesting is that in many cases Kashmir and Madagascar sapphires can be hard to distinguish.

Both contain zircon crystals, BUT....
The zircon xls in the Kashmir material have been dated to approx 20my.
(AKA New Kids on the Corundum Block)

The zircon in Madagascar sapphire has been dated to 200+ million years in age.

Thanks for the congrats on my son. =D> =D> =D>


Top
 Profile  
Reply with quote  
 Post subject: Re: Separating Kashmir and Madagascar Sapphire
PostPosted: Sun Jun 06, 2021 3:34 pm 
Offline
Valued Contributor

Joined: Wed Jul 22, 2015 6:39 am
Posts: 166
Thats what I love about zircon.. I think Im old but Zircon takes the crown


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 4 posts ] 

All times are UTC - 4 hours


Who is online

Users browsing this forum: No registered users and 1 guest


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