SPOTLIGHT: ALBERTO SCARANI, GG, FEATURED PRESENTATION: SYNTHETIC DIAMONDS DEMYSTIFIED: AGA LAS VEGAS, JUNE 1
Welcome to the GemologyOnline.com Forum
A non-profit Forum for the exchange of gemological ideas
It is currently Sun May 20, 2018 7:16 pm

All times are UTC - 4 hours




Post new topic Reply to topic  [ 4 posts ] 
Author Message
 Post subject: Ruby in marble, probably from Afghanistan
PostPosted: Sat May 12, 2018 10:15 am 
Offline
New to the Forum or The Quiet Type

Joined: Mon Apr 16, 2018 7:25 am
Posts: 5
A specimen recently bought via eBay, ruby crystals in marble:

Image
Image
Image
Image
Image
Image

Backlit by the sun:
Image


Top
 Profile  
Reply with quote  
 Post subject: Re: Ruby in marble, probably from Afghanistan
PostPosted: Sun May 20, 2018 3:54 pm 
Offline
Gold Member

Joined: Sun Jun 28, 2009 9:56 am
Posts: 1207
octahedral crystals with [111] cleavage planes sounds more like spinel.


Top
 Profile  
Reply with quote  
 Post subject: Re: Ruby in marble, probably from Afghanistan
PostPosted: Sun May 20, 2018 4:59 pm 
Offline
Moderator
User avatar

Joined: Mon Apr 02, 2012 9:31 pm
Posts: 2786
Location: North Carolina
Pseudooctahedral crystal form is very typical for rubies from that locale.


Top
 Profile  
Reply with quote  
 Post subject: Re: Ruby in marble, probably from Afghanistan
PostPosted: Sun May 20, 2018 7:09 pm 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 18706
Location: San Francisco
What causes that habit, Stephen? Does it occur anywhere else?


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