June 19-20—GASTONIA, NORTH CAROLINA: Annual show; Gaston Gem, Mineral and Faceters Club; Fri. 10-6, Sat. 10-4; FREE
Welcome to the GemologyOnline.com Forum
A non-profit Forum for the exchange of gemological ideas
It is currently Thu Jun 17, 2021 8:02 pm

All times are UTC - 4 hours




Post new topic Reply to topic  [ 2 posts ] 
Author Message
 Post subject: Question about labradorite
PostPosted: Mon May 10, 2021 8:09 pm 
Offline
Active Member

Joined: Thu Jun 14, 2012 7:58 pm
Posts: 70
I read (what I could understand) the moonstone post with great interest. I didn't want to high-jack that thread, so I'm posting a new topic.

I was given some interesting labradorite (whose RI is a little higher than it should be; more in line with the RI of andesine) which shows a pink/yellow sheen. Would this be caused by larger particles in suspension or thicker layers than what is displayed in the blue sheen moonstone?

Here's one that I faceted where you can see those colors reflected. The cabochon is impossible to photograph; the pink sheen is so faint I don't believe I can get a picture of it. The interesting thing is that this stone was cut with a far steeper than average pavilion, yet still reflects/reftracts very well.


Attachments:
labradorite2.JPG
labradorite2.JPG [ 20.13 KiB | Viewed 277 times ]
Top
 Profile  
Reply with quote  
 Post subject: Re: Question about labradorite
PostPosted: Fri May 14, 2021 6:23 pm 
Offline
Gold Member
User avatar

Joined: Mon Apr 16, 2007 12:05 am
Posts: 1479
The colors could arise from labradorescence. You can find all kinds of yellows, pinks, and purples in opaque, black versions of the stone.

For sure, the colors don't arise from adularescence.


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 2 posts ] 

All times are UTC - 4 hours


Who is online

Users browsing this forum: No registered users and 4 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