CIBJO releases Gemmological Special Report: considers process of separating measurable facts from opinion; See Gemological Articles below.
Welcome to the GemologyOnline.com Forum
A non-profit Forum for the exchange of gemological ideas
It is currently Fri Nov 15, 2019 9:13 am

All times are UTC - 4 hours




Post new topic Reply to topic  [ 3 posts ] 
Author Message
 Post subject: heat treating rubies
PostPosted: Fri Nov 03, 2006 2:21 am 
Offline
Platinum Member
User avatar

Joined: Wed Apr 26, 2006 12:44 am
Posts: 2051
Location: San Francisco
I can get these unheated burmese rubies at a good price. My question is whether or not heat treating them would improve the clarity and or color. The stones are not transparent, and there are some inclusions in them as the photo's show. So can they be cleaned up? How far can it take them?

If your opposed to heat treating them, what would you sell them for as is, assuming they look like what your getting..

The first one is about 1.10 ct, 6x6x3 mm

Image

2nd stone 1.91 cts 8x6x4mm

Image


Another angle

Image


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Fri Nov 03, 2006 6:58 am 
Offline
Established Member

Joined: Thu Nov 02, 2006 12:05 am
Posts: 27
Hi,

I'm not sure whether heat treatment will significantly improve clarity, but from looking at the photos, it's a very nice red colour; unlike other common low-grade rubies that are purplish-red, brownish-red or a highly saturated red.

If you were to heat them, you will need to repolish them. How much cost will this add to you? If the rubies are visually pleasant on their own, I would sell them as they are. You also get the added benefit of explaining that they're unheated! No heat treatment without the added premium price. That's a selling point in itself!


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Sun Nov 05, 2006 11:10 pm 
Offline
Gemology Online Veteran
User avatar

Joined: Mon Oct 17, 2005 1:06 pm
Posts: 718
Location: Bangkok, Thailand
Hi,
I would be very surprised if this ruby is effectively from a Burmese origin as I never saw any blackish bluish inclusion as I see in this stone in a Burmese ruby...
If it is a Burmese ruby you should not burn it but sell it to me so I could study this unusual gem... LOL

Do you have a trustable burmese origin report for this stone?

All the best,

_________________
Vincent Pardieu

www.fieldgemology.org
www.conservationgemology.org

The views expressed here are V. Pardieu’s opinions and do not necessarily reflect those of GIA Laboratory Bangkok (http://www.giathai.net)where he is an employee since Dec 2008.


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3 posts ] 

All times are UTC - 4 hours


Who is online

Users browsing this forum: No registered users and 0 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:  
cron
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
Gemology Style ported to phpBB3 by Christian Bullock