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 10:42 am

All times are UTC - 4 hours




Post new topic Reply to topic  [ 2 posts ] 
Author Message
 Post subject: Diamond labs
PostPosted: Tue May 15, 2018 12:03 pm 
Offline
New to the Forum or The Quiet Type

Joined: Tue May 15, 2018 11:00 am
Posts: 5
Hello, I am Olga, and I would like to know information about the labs and how they graduate diamonds.

How do they work, what are their average prices for grading a diamond.

I would like to know your opinion about each one just in the diamond graduation task. (Price, quality, security, trush)

Europe:
Gem-A (Gemmological Association of Great Britain <-- Do they graduate diamonds?
Madea Worldwide
GGTL Laboratories

America:
AGL (American Gemological Laboratories)
GIA (Gemological Institute of America)
AGS (American Gem Society)
Stone Group Labs
IGI

Asia:
Lotus Gemology
AIGS

What do you know about them? What opinion do you have about them? Which one do you recommend about them and which one you would never recommend? Is missing anyone?


Top
 Profile  
Reply with quote  
 Post subject: Re: Diamond labs
PostPosted: Tue May 15, 2018 9:44 pm 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 21602
Location: San Francisco
Hi Olga and welcome.

The GIA wrote the book on diamond grading and are internationally recognized.
Prices:
https://www.gia.edu/gem-lab-fee-schedule

AGS is very well respected. Their grading is accurate and addresses light performance, which the GIA does not.


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 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