August 31-September3—RALEIGH, NORTH CAROLINA: Annual show; Treasures of the Earth, Inc.; NC State Fairgrounds; Fri. 12-6, Sat. 10-5, Sun. 10-5, Mon. 10-4;
Welcome to the GemologyOnline.com Forum
A non-profit Forum for the exchange of gemological ideas
It is currently Thu Aug 16, 2018 9:39 am

All times are UTC - 4 hours




Post new topic Reply to topic  [ 12 posts ] 
Author Message
 Post subject: Mystery Green Stones
PostPosted: Thu Jan 25, 2018 2:09 pm 
Offline
Valued Contributor
User avatar

Joined: Mon Mar 06, 2006 9:43 pm
Posts: 149
An interesting Art Deco bracelet came across my desk today. The bracelet is apparently set with early modern round brilliant cut diamonds and a mix of green glass and green mystery stones. The mystery stones are very strange when viewed under magnification - showing a wild "crazed" appearance, a dark green core and colorless edge.

I am just curious if anyone else has seen these green "gems" before. My best guess after a little bit of research is that they could potentially be synthetic Lechleitner Coated Beryl OR Richard Nacken's Synthetic Emeralds produced in the 1920's.

Thank you,
Katy B
[attachment=2]Deco Bracelet.jpg[/attachment]
[attachment=1]Mystery Stone.jpg[/attachment]
[attachment=0]Glass and Mystery Stone.jpg[/attachment]


Attachments:
Glass and Mystery Stone.jpg
Glass and Mystery Stone.jpg [ 97.92 KiB | Viewed 638 times ]
Mystery Stone.jpg
Mystery Stone.jpg [ 97.97 KiB | Viewed 638 times ]
Deco Bracelet.jpg
Deco Bracelet.jpg [ 62.32 KiB | Viewed 638 times ]
Top
 Profile  
Reply with quote  
 Post subject: Re: Mystery Green Stones
PostPosted: Sat Jan 27, 2018 2:21 pm 
Offline
Active Member

Joined: Sat Jun 18, 2016 11:24 am
Posts: 51
can't really see much in the image. What I do see looks like glue to me.


Top
 Profile  
Reply with quote  
 Post subject: Re: Mystery Green Stones
PostPosted: Sun Jan 28, 2018 4:19 am 
Offline
Valued Contributor
User avatar

Joined: Wed Mar 26, 2014 8:23 am
Posts: 241
Maybe Emerald Soudee .... or Smaryll .... ?
Lannyte-Emerald would be from a later time.

It was very usual to set Diamonds in combination with Emerald Soudee.


Top
 Profile  
Reply with quote  
 Post subject: Re: Mystery Green Stones
PostPosted: Sun Jan 28, 2018 11:47 am 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 18877
Location: San Francisco
When you say "early round brilliants" are you seeing old European cuts or transitional cuts?
What is the metal?


Top
 Profile  
Reply with quote  
 Post subject: Re: Mystery Green Stones
PostPosted: Sun Jan 28, 2018 3:04 pm 
Offline
Valued Contributor
User avatar

Joined: Mon Mar 06, 2006 9:43 pm
Posts: 149
Thank you for the feedback!
The bracelet is platinum. Yes, the diamonds are transitional cuts. Sometimes it seems that the name "transitional" is synonymous with "early modern round brilliants" from what I have heard.
Best wishes,
Katy B


Top
 Profile  
Reply with quote  
 Post subject: Re: Mystery Green Stones
PostPosted: Sun Jan 28, 2018 11:57 pm 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 18877
Location: San Francisco
Hi Katy.
I'd put my money on glass.
Not uncommon.


Top
 Profile  
Reply with quote  
 Post subject: Re: Mystery Green Stones
PostPosted: Mon Jan 29, 2018 8:44 am 
Offline
Gemology Online Veteran
User avatar

Joined: Thu Feb 22, 2007 10:23 am
Posts: 854
Location: GemClub
Katy B wrote:
...The bracelet is apparently set with early modern round brilliant cut diamonds and a mix of green glass and green mystery stones...

it means you identify green glass and another mystery stone? what gave the conclusion its glass?

as for mystery stone (or even those glass you identified) search for glass ceramics or Nano Crystal on this forum and Internet, they are suitable to cut in small sizes and have nice uniform color.

_________________
Farshid Roshanravan ( Roman )
http://diamondclub.us
http://gemclub.co
Blog: http://roshanravan.tumblr.com/


Top
 Profile  
Reply with quote  
 Post subject: Re: Mystery Green Stones
PostPosted: Tue Jan 30, 2018 9:58 am 
Offline
Gemology Online Veteran

Joined: Wed Jan 23, 2013 5:29 pm
Posts: 873
Location: Paris
Why not simply emeralds ?
Beacuse they are glued ?


Top
 Profile  
Reply with quote  
 Post subject: Re: Mystery Green Stones
PostPosted: Tue Jan 30, 2018 9:44 pm 
Offline
Valued Contributor
User avatar

Joined: Mon Mar 06, 2006 9:43 pm
Posts: 149
Hi, Farshid -

I believed that some of the green stones (the bright green, perfect looking ones) were glass due to the large number of gas bubbles and their overall appearance/luster.

After receiving some great feedback from the group - I have concluded that the other green stones (the ones that look like they are crazed or deteriorated) to be doublets of some sort. My descriptive term will most likely be -
emerald simulant, doublet and/or "emerald Soudee" as Steinfroilein mentioned :) .

Thank you,
Katy B


Top
 Profile  
Reply with quote  
 Post subject: Re: Mystery Green Stones
PostPosted: Wed Jan 31, 2018 7:57 pm 
Offline
Gemology Online Veteran
User avatar

Joined: Thu Feb 22, 2007 10:23 am
Posts: 854
Location: GemClub
Hi Katy 8)
well doublets in those sizes are odd. if you can post some better pictures

_________________
Farshid Roshanravan ( Roman )
http://diamondclub.us
http://gemclub.co
Blog: http://roshanravan.tumblr.com/


Last edited by roshanravan on Thu Feb 01, 2018 11:21 pm, edited 1 time in total.

Top
 Profile  
Reply with quote  
 Post subject: Re: Mystery Green Stones
PostPosted: Thu Feb 01, 2018 8:16 am 
Offline
Gemology Online Veteran

Joined: Wed Jan 23, 2013 5:29 pm
Posts: 873
Location: Paris
I don't believe in doublets either. Nor in synthetic emeralds.
I would say either glass or plain natural emeralds. Why not emeralds ? The bracelet is in platinum.
The piece would need to be seen by someone in person.


Top
 Profile  
Reply with quote  
 Post subject: Re: Mystery Green Stones
PostPosted: Thu Feb 01, 2018 10:51 am 
Offline
Moderator
User avatar

Joined: Mon Apr 02, 2012 9:31 pm
Posts: 2893
Location: North Carolina
That layer of crazing around a clean core is very odd. It seems like it should be very diagnostic.


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 12 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