Tutoring Sessions for Gemology Students and Enthusiasts

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How to tell if a Lightning Ridge black opal is real or fake?

Last post by ArmoniaGems « Tue Feb 03, 2026 2:31 am

by ArmoniaGems » Tue Feb 03, 2026 2:31 am

0 Replies

48 Views

Last post by ArmoniaGems
Tue Feb 03, 2026 2:31 am
What Does 925 and 585 Mean on Jewelry?

Last post by Barbra Voltaire, FGG « Thu Jan 15, 2026 8:13 pm
Replies: 1
by ArmoniaGems » Thu Jan 15, 2026 6:15 am

1 Replies

338 Views

Last post by Barbra Voltaire, FGG
Thu Jan 15, 2026 8:13 pm
Regular online platform for gemmology updates

Last post by glhays « Sat Jun 25, 2022 2:33 pm
Replies: 1
by Leel » Sat Jun 25, 2022 2:34 am

1 Replies

46929 Views

Last post by glhays
Sat Jun 25, 2022 2:33 pm
Learning to use Advanced equipment

Last post by 1bwana1 « Sat Aug 28, 2021 12:03 pm
Replies: 2
by Leel » Fri Aug 27, 2021 8:47 pm

2 Replies

21196 Views

Last post by 1bwana1
Sat Aug 28, 2021 12:03 pm
FGA diploma theory exams

Last post by HenkRijneveld « Sat Aug 28, 2021 7:43 am
Replies: 1
by Leel » Fri Aug 27, 2021 8:36 pm

1 Replies

8633 Views

Last post by HenkRijneveld
Sat Aug 28, 2021 7:43 am
Starting Gemology (Please help me to choose the right path)

Last post by Barbra Voltaire, FGG « Tue Mar 30, 2021 1:13 pm
Replies: 10
by mariona193 » Mon Jun 03, 2019 4:13 pm

10 Replies

16843 Views

Last post by Barbra Voltaire, FGG
Tue Mar 30, 2021 1:13 pm
NOVA Documentary - Treasures of the Earth - GEMS

Last post by Barbra Voltaire, FGG « Sat Nov 30, 2019 2:11 pm

by Barbra Voltaire, FGG » Sat Nov 30, 2019 2:11 pm

0 Replies

12592 Views

Last post by Barbra Voltaire, FGG
Sat Nov 30, 2019 2:11 pm
Gem and Jewelry Economics

Last post by OliVDB5590 « Wed Nov 27, 2019 12:31 pm
Replies: 2
by Paulo » Wed Mar 19, 2008 1:11 pm

2 Replies

14501 Views

Last post by OliVDB5590
Wed Nov 27, 2019 12:31 pm
RI Birefringence Flat Facet Testing

Last post by Barbra Voltaire, FGG « Mon May 21, 2018 11:55 pm
Replies: 1
by Bridge59 » Mon May 21, 2018 10:39 pm

1 Replies

11050 Views

Last post by Barbra Voltaire, FGG
Mon May 21, 2018 11:55 pm
Spectrum

Last post by path914 « Thu Dec 28, 2017 10:50 pm
Replies: 2
by kojf » Sat Sep 09, 2017 11:41 am

2 Replies

9957 Views

Last post by path914
Thu Dec 28, 2017 10:50 pm
estimating weight of diamonds

Last post by Dan&Sally « Tue Nov 10, 2015 5:21 pm
Replies: 1
by Dan&Sally » Thu Nov 05, 2015 12:54 am

1 Replies

10317 Views

Last post by Dan&Sally
Tue Nov 10, 2015 5:21 pm
Gemology test

Last post by dchallener « Sun Sep 27, 2015 2:10 pm
Replies: 11
by dchallener » Wed Jul 29, 2015 9:32 pm

11 Replies

15109 Views

Last post by dchallener
Sun Sep 27, 2015 2:10 pm
Let's talk light!

Last post by dchallener « Tue Aug 11, 2015 10:47 pm
Replies: 42
by Brian » Tue Apr 03, 2012 12:50 pm
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42 Replies

36611 Views

Last post by dchallener
Tue Aug 11, 2015 10:47 pm
Gemology

Last post by Robin Winter « Fri Jul 10, 2015 10:00 pm
Replies: 1
by Bill Hanneman » Thu Jul 09, 2015 1:38 am

1 Replies

11719 Views

Last post by Robin Winter
Fri Jul 10, 2015 10:00 pm
Stonetes Teslap

Last post by thinslicevolta « Tue Feb 10, 2015 9:34 pm
Replies: 1
by exw23able » Fri Feb 06, 2015 3:58 am

1 Replies

12344 Views

Last post by thinslicevolta
Tue Feb 10, 2015 9:34 pm
The streak continues........

Last post by Barbara O. Ellis « Thu Dec 04, 2014 11:48 pm
Replies: 15
by Julie Gowans-Poli » Fri Aug 20, 2010 3:16 pm
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15 Replies

24817 Views

Last post by Barbara O. Ellis
Thu Dec 04, 2014 11:48 pm
Chat.....

Last post by Frank « Mon Sep 23, 2013 3:03 pm
Replies: 84
by wypwong » Sun Feb 28, 2010 5:38 pm
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84 Replies

60438 Views

Last post by Frank
Mon Sep 23, 2013 3:03 pm
Hello

Last post by Nindi « Tue Aug 13, 2013 6:03 am
Replies: 2
by Nindi » Tue Jul 30, 2013 8:37 pm

2 Replies

11286 Views

Last post by Nindi
Tue Aug 13, 2013 6:03 am
band gap theory

Last post by Tim « Sun Jul 08, 2012 2:52 pm
Replies: 3
by Lucy- » Fri Jul 06, 2012 8:03 am

3 Replies

17016 Views

Last post by Tim
Sun Jul 08, 2012 2:52 pm
Crystal Systems - confused with the axes

Last post by Frank « Mon Jul 02, 2012 1:52 pm
Replies: 17
by Lucy- » Mon Jun 25, 2012 4:54 pm
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17 Replies

21146 Views

Last post by Frank
Mon Jul 02, 2012 1:52 pm
Need help.......

Last post by CraftyCritter « Fri Nov 04, 2011 8:02 pm
Replies: 15
by CraftyCritter » Thu Oct 27, 2011 5:44 pm
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15 Replies

14556 Views

Last post by CraftyCritter
Fri Nov 04, 2011 8:02 pm
New chat from Brian

Last post by Brian « Tue Jun 07, 2011 11:19 pm
Replies: 16
by Frank » Sat May 21, 2011 4:26 pm
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16 Replies

16384 Views

Last post by Brian
Tue Jun 07, 2011 11:19 pm
Best Used Scopes?

Last post by G4Lab « Thu May 05, 2011 12:25 pm
Replies: 82
by mitch57 » Tue Apr 12, 2011 10:22 pm
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82 Replies

40243 Views

Last post by G4Lab
Thu May 05, 2011 12:25 pm
Chats finished for the duation of the vacation

Last post by Frank « Sat Jul 10, 2010 1:53 pm

by Frank » Sat Jul 10, 2010 1:53 pm

0 Replies

6420 Views

Last post by Frank
Sat Jul 10, 2010 1:53 pm
Chats changing back to Saturday nights.

Last post by Frank « Sat Jun 19, 2010 1:34 pm
Replies: 8
by Frank » Thu May 20, 2010 1:37 pm

8 Replies

8948 Views

Last post by Frank
Sat Jun 19, 2010 1:34 pm
Revision week

Last post by Frank « Sun Jun 06, 2010 1:44 pm

by Frank » Sun Jun 06, 2010 1:44 pm

0 Replies

6338 Views

Last post by Frank
Sun Jun 06, 2010 1:44 pm
crystal symmetry Sunday 7th Feb

Last post by Pedro « Sun Feb 14, 2010 11:49 pm
Replies: 5
by Frank » Wed Feb 03, 2010 3:59 pm

5 Replies

8346 Views

Last post by Pedro
Sun Feb 14, 2010 11:49 pm
revision chats for gem-a students

Last post by Frank « Sun Jan 17, 2010 3:08 pm
Replies: 7
by Frank » Sun Jun 07, 2009 5:29 pm

7 Replies

10252 Views

Last post by Frank
Sun Jan 17, 2010 3:08 pm
back for more chats

Last post by Frank « Sat Dec 19, 2009 11:57 am
Replies: 39
by Brian » Thu Nov 12, 2009 12:42 pm
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39 Replies

28643 Views

Last post by Frank
Sat Dec 19, 2009 11:57 am
Using an IRC client to chat instead of the web login

Last post by Julie Gowans-Poli « Fri Nov 06, 2009 5:34 am
Replies: 17
by Julie Gowans-Poli » Wed Nov 04, 2009 8:36 pm
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17 Replies

20575 Views

Last post by Julie Gowans-Poli
Fri Nov 06, 2009 5:34 am
chat tomorow?

Last post by Brian « Tue Nov 03, 2009 12:45 am
Replies: 18
by Pedro » Fri Oct 16, 2009 4:33 pm
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18 Replies

19323 Views

Last post by Brian
Tue Nov 03, 2009 12:45 am
Is there a chat this week?

Last post by Julie Gowans-Poli « Sun Oct 11, 2009 11:18 am
Replies: 6
by Julie Gowans-Poli » Sat Oct 10, 2009 12:57 pm

6 Replies

9855 Views

Last post by Julie Gowans-Poli
Sun Oct 11, 2009 11:18 am
restart of the weekly chats

Last post by Julie Gowans-Poli « Wed Sep 30, 2009 2:43 pm
Replies: 24
by Frank » Mon Sep 14, 2009 4:47 pm
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24 Replies

31792 Views

Last post by Julie Gowans-Poli
Wed Sep 30, 2009 2:43 pm
Coming up: fused chats, gemmology & physics

Last post by Tim « Tue Jul 14, 2009 10:22 am
Replies: 54
by Tim » Mon Apr 27, 2009 2:46 pm
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54 Replies

92731 Views

Last post by Tim
Tue Jul 14, 2009 10:22 am
New: Sunday chats

Last post by Brian « Mon Apr 27, 2009 2:56 pm
Replies: 271
by Doos » Wed May 30, 2007 10:58 am
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271 Replies

185555 Views

Last post by Brian
Mon Apr 27, 2009 2:56 pm
Saturday Gemmology Chats

Last post by Tim « Sat Apr 04, 2009 2:24 pm
Replies: 67
by Tim » Mon Aug 11, 2008 3:08 pm
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67 Replies

72317 Views

Last post by Tim
Sat Apr 04, 2009 2:24 pm
UC Berkeley Gemology Class

Last post by Barbra Voltaire, FGG « Mon Mar 02, 2009 7:58 am

by Barbra Voltaire, FGG » Mon Mar 02, 2009 7:58 am

0 Replies

9142 Views

Last post by Barbra Voltaire, FGG
Mon Mar 02, 2009 7:58 am
Saturday Chat???

Last post by Doos « Sun Feb 15, 2009 6:15 am
Replies: 2
by Mr Calloway » Sat Feb 14, 2009 8:18 pm

2 Replies

7564 Views

Last post by Doos
Sun Feb 15, 2009 6:15 am
Directional Properties

Last post by Barbara O. Ellis « Wed Nov 05, 2008 10:47 am
Replies: 6
by natascha » Sun Mar 30, 2008 12:15 pm

6 Replies

12873 Views

Last post by Barbara O. Ellis
Wed Nov 05, 2008 10:47 am
How much time to Allow for GIA Gem ID distance class

Last post by gemlover « Mon Jul 28, 2008 9:01 pm
Replies: 2
by Barbra Voltaire, FGG » Mon Jul 28, 2008 12:22 pm

2 Replies

9412 Views

Last post by gemlover
Mon Jul 28, 2008 9:01 pm
It'll be quiet for a few weeks on the saturday

Last post by Brian « Tue Jul 08, 2008 5:08 pm
Replies: 2
by Tim » Tue Jul 08, 2008 1:25 pm

2 Replies

8092 Views

Last post by Brian
Tue Jul 08, 2008 5:08 pm
LIVE TODAY :

Last post by Tim « Sat Jun 28, 2008 9:36 am
Replies: 13
by Tim » Sat Apr 26, 2008 12:33 pm

13 Replies

15560 Views

Last post by Tim
Sat Jun 28, 2008 9:36 am
Coming up soon: Australasian chat

Last post by Keirkof « Sat Jun 21, 2008 6:57 am
Replies: 1
by Tim » Sat Jun 07, 2008 10:33 am

1 Replies

7957 Views

Last post by Keirkof
Sat Jun 21, 2008 6:57 am
Posted Chat Logs

Last post by Barbra Voltaire, FGG « Tue May 06, 2008 12:44 pm

by Barbra Voltaire, FGG » Tue May 06, 2008 12:44 pm

0 Replies

7868 Views

Last post by Barbra Voltaire, FGG
Tue May 06, 2008 12:44 pm
Tutorial on using mIRC to join the online class

Last post by Tim « Sun Apr 27, 2008 11:51 am
Replies: 3
by Keirkof » Sun Apr 27, 2008 11:08 am

3 Replies

9448 Views

Last post by Tim
Sun Apr 27, 2008 11:51 am
I can't get into the new chatroom

Last post by Tim « Sun Apr 27, 2008 11:15 am
Replies: 6
by Frank » Sat Apr 26, 2008 4:04 pm

6 Replies

10286 Views

Last post by Tim
Sun Apr 27, 2008 11:15 am
Saturday Chats 2 hours earlier

Last post by Barbra Voltaire, FGG « Thu Apr 24, 2008 10:50 am
Replies: 1
by Tim » Thu Apr 24, 2008 3:06 am

1 Replies

9072 Views

Last post by Barbra Voltaire, FGG
Thu Apr 24, 2008 10:50 am
Saturday Chats

Last post by Crystal Star « Wed Apr 23, 2008 4:31 pm
Replies: 49
by wildflower » Tue Oct 16, 2007 4:08 pm
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49 Replies

52734 Views

Last post by Crystal Star
Wed Apr 23, 2008 4:31 pm
gemology equipments

Last post by Annie « Sun Mar 02, 2008 2:04 am
Replies: 3
by hiromasa » Sat Mar 01, 2008 5:41 am

3 Replies

10642 Views

Last post by Annie
Sun Mar 02, 2008 2:04 am
Sunday Chat

Last post by arainboz « Thu Feb 14, 2008 5:19 pm
Replies: 4
by Snizzer » Sat Nov 05, 2005 5:38 pm

4 Replies

16337 Views

Last post by arainboz
Thu Feb 14, 2008 5:19 pm

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