DR. HANNEMAN'S MINERAL COLLECTION WILL BE AVAILABLE FOR SALE IN THE NEAR FUTURE
Welcome to the GemologyOnline.com Forum
A non-profit Forum for the exchange of gemological ideas
It is currently Thu Nov 26, 2020 10:38 am

All times are UTC - 4 hours




Post new topic Reply to topic  [ 3 posts ] 
Author Message
 Post subject: Green stone identification
PostPosted: Mon Oct 26, 2020 7:30 pm 
Offline
Established Member

Joined: Fri Jun 19, 2020 8:16 pm
Posts: 29
I bought a cheap lot of mixed gemstones with the hope that some interesting inclusions would be included.
What I got was mostly quartz gems with a sprinkling of peridot and pale blue topaz.

The garnets lived up to expectation wtih a vengence. I'm going to have a great deal of fun checking them out. Silk and crystals from top to bottom.

The mystery stone is an odd green stone;
It has a tremendous fat girdle.
Under the microscope there are striations, but they don't look like verneuil growth lines.
SG: 2.54
RI: 1.530 I repeated this test several times and also got a couple of 1.520
The stone does not seem to have any fluorescence, nor does it wink under crossed polars.
It show a faint pink colour through the chelsea filter but I could not see much in the spectroscope.
Attachment:
green-stone.jpg
green-stone.jpg [ 21.59 KiB | Viewed 328 times ]
Attachment:
green-stripes.jpg
green-stripes.jpg [ 15.67 KiB | Viewed 328 times ]

There was also an orange stone that looked very similar:
Attachment:
orange-stone.jpg
orange-stone.jpg [ 12.88 KiB | Viewed 328 times ]



What is it?
I'm thinking dyed chalcedony? I have no idea how to confirm this guess for a very inexpensive stone.
I'm sure it's a common little filler stone for cheap lots, but I'd not run across it before. Any guesses?


Attachments:
orange-stone.jpg
orange-stone.jpg [ 12.88 KiB | Viewed 328 times ]
Top
 Profile  
Reply with quote  
 Post subject: Re: Green stone identification
PostPosted: Mon Oct 26, 2020 8:37 pm 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 20474
Location: San Francisco
I suspect the green stone is dyed chalcedony.


Top
 Profile  
Reply with quote  
 Post subject: Re: Green stone identification
PostPosted: Tue Oct 27, 2020 2:17 am 
Offline
Moderator
User avatar

Joined: Mon Apr 02, 2012 9:31 pm
Posts: 3666
Location: North Carolina
Yup, that's your classic dyed agate. Likely started life as a common grey agate from Brazil. Sometimes sold as "green onyx" for the green or just as carnelian for the red (though the color is often wrong enough to immediately spot it as a fake vs a natural carnelian).

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


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 3 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