January 24 Through February 4—TUCSON, ARIZONA: Annual show
Welcome to the GemologyOnline.com Forum
A non-profit Forum for the exchange of gemological ideas
It is currently Thu Mar 28, 2024 6:01 am

All times are UTC - 4 hours




Post new topic Reply to topic  [ 5 posts ] 
Author Message
 Post subject: Vanadium emerald needed
PostPosted: Thu Oct 18, 2007 7:57 am 
Offline
Valued Contributor
User avatar

Joined: Mon Oct 17, 2005 2:52 pm
Posts: 241
Location: France | French Riviera
Hello,

I want to compare the Vis-NIR spectrum of
vanadium and copper beharing synthetic hydrothermal emerald
with the spectrum of a
natural vanadium beharing emerald from the Salininhas location in brazil.

Thank you to contact me by mp if you have litle sample (rought or cut) of naturel pure vanadium emerald (mostly from Saininhas).

thank you :)

_________________
Regards

Jean-Marie Arlabosse
GemInterest.com


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Thu Oct 18, 2007 6:01 pm 
Offline
Gold Member
User avatar

Joined: Mon Apr 16, 2007 12:05 am
Posts: 1499
Sorry I don't have a sample myself.

But I sure hope you are able to borrow one, because I'd love to see the results of the comparison with chromium emeralds.


Last edited by Brian on Sat Oct 27, 2007 12:28 am, edited 1 time in total.

Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Thu Oct 18, 2007 6:11 pm 
Offline
Gemology Online Veteran
User avatar

Joined: Fri Sep 08, 2006 7:03 pm
Posts: 605
Location: Sweden
I think I can get a friend to send you some vanadium coloured emerald from Norway if that is of interest? Ain't sure what you mean with "pure vanadium emerald" but I suppose you mean that it shouldn't contain chromium, which the norwegian emeralds are free from (or rather; lack).

_________________
If it sounds good, then say it again!


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Fri Oct 19, 2007 1:52 am 
Offline
Platinum Member
User avatar

Joined: Wed Apr 26, 2006 12:44 am
Posts: 2056
Location: San Francisco
you can check it w/ a chelsa filter.. if no red = vanadium.. ( make sure you check w/ a dichroscope and get the blue/green split ( don't want to be sending vanadium glass now..)

_________________
Custom Gemstone Cutting and various other activities!


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Fri Oct 26, 2007 7:16 am 
Offline
Valued Contributor
User avatar

Joined: Mon Oct 17, 2005 2:52 pm
Posts: 241
Location: France | French Riviera
Hello,

Thank you very much for your help.
Jung Kee, I have send you an mp about Norway sample V-emerald 8) .

_________________
Regards

Jean-Marie Arlabosse
GemInterest.com


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 5 posts ] 

All times are UTC - 4 hours


Who is online

Users browsing this forum: No registered users and 9 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