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World First: Lab Grown Hexagonal Diamonds

Last post by Stephen Challener « Fri Oct 03, 2025 7:05 pm
Replies: 3
by Barbra Voltaire, FGG » Thu Aug 07, 2025 8:34 pm

3 Replies

5830 Views

Last post by Stephen Challener
Fri Oct 03, 2025 7:05 pm
Elements: GEMS

Last post by danielle « Sat Sep 16, 2023 4:32 pm
Replies: 1
by Barbra Voltaire, FGG » Sat Sep 16, 2023 12:44 pm

1 Replies

30272 Views

Last post by danielle
Sat Sep 16, 2023 4:32 pm
Agate-like banding in Ethiopian opal--paper #2!

Last post by Stephen Challener « Thu Aug 19, 2021 12:34 pm
Replies: 5
by Stephen Challener » Tue May 15, 2018 8:58 pm

5 Replies

36865 Views

Last post by Stephen Challener
Thu Aug 19, 2021 12:34 pm
Dating Zircon inclusions in Sapphire

Last post by Barbra Voltaire, FGG « Mon Aug 02, 2021 7:14 pm

by Barbra Voltaire, FGG » Mon Aug 02, 2021 7:14 pm

0 Replies

26721 Views

Last post by Barbra Voltaire, FGG
Mon Aug 02, 2021 7:14 pm
Gemology as a Science Presented by James Shigley

Last post by Barbra Voltaire, FGG « Tue Dec 01, 2020 2:58 pm

by Barbra Voltaire, FGG » Tue Dec 01, 2020 2:58 pm

0 Replies

13275 Views

Last post by Barbra Voltaire, FGG
Tue Dec 01, 2020 2:58 pm
Raman/PL results: Color origin of Red coral & conch pearl

Last post by thresh « Sat Jun 22, 2019 3:38 am
Replies: 2
by mikko » Sun Nov 25, 2012 6:23 am

2 Replies

21240 Views

Last post by thresh
Sat Jun 22, 2019 3:38 am
Gemologist Finds Insect Entombed in Opal Rather Than Amber

Last post by Barbra Voltaire, FGG « Wed Mar 06, 2019 12:43 pm
Replies: 8
by Barbra Voltaire, FGG » Thu Jan 24, 2019 9:50 pm

8 Replies

10687 Views

Last post by Barbra Voltaire, FGG
Wed Mar 06, 2019 12:43 pm
Non cuprian blue/purple tourmaline. Why is it rare?

Last post by bruce_tourm « Wed Feb 27, 2019 12:58 pm

by bruce_tourm » Wed Feb 27, 2019 12:58 pm

0 Replies

6716 Views

Last post by bruce_tourm
Wed Feb 27, 2019 12:58 pm
A Christmas wish, researching tourmaline color.

Last post by bruce_tourm « Thu Dec 20, 2018 2:05 pm

by bruce_tourm » Thu Dec 20, 2018 2:05 pm

0 Replies

5334 Views

Last post by bruce_tourm
Thu Dec 20, 2018 2:05 pm
A Tale of Two Tourmalines.

Last post by Marlow « Sun Feb 25, 2018 4:27 am
Replies: 1
by bruce_tourm » Sun Dec 31, 2017 10:36 pm

1 Replies

6695 Views

Last post by Marlow
Sun Feb 25, 2018 4:27 am
Testing a tourmaline with 1 wt. percent lead, Achroite.

Last post by Barbra Voltaire, FGG « Fri Feb 23, 2018 12:48 pm
Replies: 1
by bruce_tourm » Fri Feb 23, 2018 12:52 am

1 Replies

5320 Views

Last post by Barbra Voltaire, FGG
Fri Feb 23, 2018 12:48 pm
Recent Oyster find

Last post by bwebbman « Thu Dec 21, 2017 4:08 pm
Replies: 6
by bwebbman » Tue Dec 19, 2017 6:24 pm

6 Replies

6026 Views

Last post by bwebbman
Thu Dec 21, 2017 4:08 pm
Interesting SEM images of gems at physicsforum

Last post by norman « Mon Nov 13, 2017 6:51 pm
Replies: 3
by norman » Fri Nov 10, 2017 8:13 pm

3 Replies

5492 Views

Last post by norman
Mon Nov 13, 2017 6:51 pm
Photoluminescence Spectra of Emeralds by Brian Thompson

Last post by Barbra Voltaire, FGG « Thu Nov 09, 2017 12:55 pm

by Barbra Voltaire, FGG » Thu Nov 09, 2017 12:55 pm

0 Replies

5325 Views

Last post by Barbra Voltaire, FGG
Thu Nov 09, 2017 12:55 pm
How to Burn Spinels Gem?

Last post by Barbra Voltaire, FGG « Tue Sep 19, 2017 10:31 pm
Replies: 1
by cashace » Tue Sep 19, 2017 12:53 pm

1 Replies

6385 Views

Last post by Barbra Voltaire, FGG
Tue Sep 19, 2017 10:31 pm
CIE color comparison between cuprian and non cuprian tourma.

Last post by gembug « Fri Sep 08, 2017 2:09 pm
Replies: 5
by bruce_tourm » Tue Aug 29, 2017 7:53 pm

5 Replies

6040 Views

Last post by gembug
Fri Sep 08, 2017 2:09 pm
Paternity test for emeralds

Last post by desertgem « Sat Apr 15, 2017 6:31 pm
Replies: 5
by steinfroilein » Tue Apr 11, 2017 7:39 am

5 Replies

6407 Views

Last post by desertgem
Sat Apr 15, 2017 6:31 pm
Updated editions of all Blue Books of standards/nomenclature

Last post by Barbra Voltaire, FGG « Mon Feb 13, 2017 4:31 pm

by Barbra Voltaire, FGG » Mon Feb 13, 2017 4:31 pm

0 Replies

5559 Views

Last post by Barbra Voltaire, FGG
Mon Feb 13, 2017 4:31 pm
Trace elements in cuprian tourmaline from Mavuco Mozam.

Last post by bruce_tourm « Wed Jan 04, 2017 8:47 pm
Replies: 2
by bruce_tourm » Tue Jan 03, 2017 9:10 pm

2 Replies

5623 Views

Last post by bruce_tourm
Wed Jan 04, 2017 8:47 pm
Trace Element characterization of tourmalines worldwide

Last post by Tom Herman « Fri Dec 16, 2016 1:13 am
Replies: 6
by Jason Barrett » Sat Jul 18, 2015 2:02 am

6 Replies

12110 Views

Last post by Tom Herman
Fri Dec 16, 2016 1:13 am
Marco Campos-Venuti: Course on Microcrystalline Silica

Last post by Lefty « Mon Dec 05, 2016 6:51 am
Replies: 7
by Barbra Voltaire, FGG » Mon Jan 04, 2016 7:02 pm

7 Replies

7917 Views

Last post by Lefty
Mon Dec 05, 2016 6:51 am
Quasicrystals Anyone?

Last post by dchallener « Sat Mar 21, 2015 1:16 pm
Replies: 4
by ROM » Fri Jun 05, 2009 1:05 am

4 Replies

11505 Views

Last post by dchallener
Sat Mar 21, 2015 1:16 pm
opal play of color to produce a cat's eye effect

Last post by Qld Barry « Mon Feb 23, 2015 6:56 pm
Replies: 5
by facetwiz » Thu Feb 13, 2014 12:58 pm

5 Replies

7521 Views

Last post by Qld Barry
Mon Feb 23, 2015 6:56 pm
Cairngorm

Last post by Roy « Thu Oct 09, 2014 3:48 pm
Replies: 5
by Doos » Wed Aug 27, 2008 6:35 am

5 Replies

16886 Views

Last post by Roy
Thu Oct 09, 2014 3:48 pm
Orientation and Cutting the Catseye Tourmaline

Last post by Ivanhoe « Sat Mar 15, 2014 11:05 pm
Replies: 2
by Ivanhoe » Sat Mar 15, 2014 6:20 am

2 Replies

7224 Views

Last post by Ivanhoe
Sat Mar 15, 2014 11:05 pm
Diamond plus

Last post by Julie Gowans-Poli « Sat Jan 11, 2014 8:39 pm
Replies: 1
by Dov » Sat Jan 11, 2014 3:27 pm

1 Replies

6274 Views

Last post by Julie Gowans-Poli
Sat Jan 11, 2014 8:39 pm
OOPS!

Last post by jimsfault « Fri Jan 03, 2014 9:26 pm
Replies: 1
by ROM » Fri Jan 03, 2014 7:21 pm

1 Replies

6053 Views

Last post by jimsfault
Fri Jan 03, 2014 9:26 pm
Diamond Oceans Possible on Uranus, Neptune

Last post by Qld Barry « Thu Jan 02, 2014 1:11 am
Replies: 9
by Barbra Voltaire, FGG » Mon Feb 28, 2011 6:45 pm

9 Replies

10095 Views

Last post by Qld Barry
Thu Jan 02, 2014 1:11 am
Raman/PL results: Detecting HPHT treatment of type IIa Dia

Last post by Tim « Wed Sep 11, 2013 12:12 pm
Replies: 13
by Alberto » Wed Sep 04, 2013 3:46 pm

13 Replies

13372 Views

Last post by Tim
Wed Sep 11, 2013 12:12 pm
Modified Tourmaline

Last post by Barbara O. Ellis « Wed Jul 10, 2013 11:51 pm
Replies: 10
by Megatastic » Thu Jun 24, 2010 1:21 am

10 Replies

17191 Views

Last post by Barbara O. Ellis
Wed Jul 10, 2013 11:51 pm
A little piece of "research" that caught my eye...

Last post by Barbara O. Ellis « Wed Jul 10, 2013 11:46 pm
Replies: 3
by jimsfault » Fri Jul 27, 2012 8:50 pm

3 Replies

7442 Views

Last post by Barbara O. Ellis
Wed Jul 10, 2013 11:46 pm
Raman/PL Results: Jade types and polymers detection

Last post by Lee Little « Sun May 12, 2013 7:25 am
Replies: 1
by Alberto » Tue Apr 30, 2013 8:39 am

1 Replies

7601 Views

Last post by Lee Little
Sun May 12, 2013 7:25 am
Study on corundum crystals from Sweden

Last post by Barbra Voltaire, FGG « Fri Apr 12, 2013 10:34 am
Replies: 6
by Chrysos » Mon Apr 08, 2013 9:34 pm

6 Replies

8659 Views

Last post by Barbra Voltaire, FGG
Fri Apr 12, 2013 10:34 am
Raman/PL results: Det. color origin of cult.red FW pearls

Last post by Alberto « Thu Apr 04, 2013 10:45 am

by Alberto » Thu Apr 04, 2013 10:45 am

0 Replies

6323 Views

Last post by Alberto
Thu Apr 04, 2013 10:45 am
Raman/PL results: Characterizing emerald types

Last post by Bill Hanneman « Wed Jan 23, 2013 1:33 am
Replies: 9
by Alberto » Sat Jan 19, 2013 5:10 pm

9 Replies

9534 Views

Last post by Bill Hanneman
Wed Jan 23, 2013 1:33 am
GO Joint Research Project I...

Last post by Frank « Fri Oct 26, 2012 2:08 pm
Replies: 17
by Ux4 » Wed Nov 16, 2005 4:38 pm
1

2
17 Replies

43352 Views

Last post by Frank
Fri Oct 26, 2012 2:08 pm
Raman/PL results: Spinels

Last post by HHelton « Thu Sep 27, 2012 5:32 pm
Replies: 7
by mikko » Sun Sep 23, 2012 10:47 am

7 Replies

9422 Views

Last post by HHelton
Thu Sep 27, 2012 5:32 pm
Identification of Blue spinel with colored filters/UV

Last post by jimsfault « Tue Sep 25, 2012 7:37 pm
Replies: 13
by Osman khattak » Wed Sep 19, 2012 4:58 pm

13 Replies

11432 Views

Last post by jimsfault
Tue Sep 25, 2012 7:37 pm
Digital Refractometer - Soliciting Input

Last post by Alberto « Tue Aug 07, 2012 1:50 pm
Replies: 38
by jleb » Mon Feb 26, 2007 12:27 am
1

2

3
38 Replies

55854 Views

Last post by Alberto
Tue Aug 07, 2012 1:50 pm
NIR absorbance spectra of tourmaline

Last post by Brian « Mon Oct 31, 2011 3:02 pm
Replies: 33
by Brian » Thu Apr 29, 2010 5:00 pm
1

2

3
33 Replies

29616 Views

Last post by Brian
Mon Oct 31, 2011 3:02 pm
UV-Vis and FTIR resources?

Last post by pattarat « Fri Oct 14, 2011 5:33 am
Replies: 2
by pattarat » Fri Oct 14, 2011 5:06 am

2 Replies

7762 Views

Last post by pattarat
Fri Oct 14, 2011 5:33 am
more tourmaline NIR

Last post by Brian « Wed Oct 05, 2011 9:46 am
Replies: 18
by Brian » Mon Sep 12, 2011 2:52 pm
1

2
18 Replies

16187 Views

Last post by Brian
Wed Oct 05, 2011 9:46 am
Gemstones Identification

Last post by zen « Wed Aug 31, 2011 5:09 am
Replies: 11
by zen » Wed Aug 17, 2011 5:05 am

11 Replies

11638 Views

Last post by zen
Wed Aug 31, 2011 5:09 am
Identification of Black diamond

Last post by cascaillou « Sun Aug 28, 2011 6:37 am
Replies: 3
by zen » Mon Jul 04, 2011 3:03 am

3 Replies

9686 Views

Last post by cascaillou
Sun Aug 28, 2011 6:37 am
chrome tourmaline

Last post by Brian « Fri Jul 22, 2011 3:58 pm
Replies: 40
by Brian » Mon Mar 14, 2011 6:06 pm
1

2

3
40 Replies

28874 Views

Last post by Brian
Fri Jul 22, 2011 3:58 pm
V3+ as colorant in gemstones (french)

Last post by ethoreux « Sun Jul 10, 2011 4:32 am

by ethoreux » Sun Jul 10, 2011 4:32 am

0 Replies

7037 Views

Last post by ethoreux
Sun Jul 10, 2011 4:32 am
diamond

Last post by Frank « Thu May 26, 2011 2:08 pm
Replies: 14
by Brian » Fri Jun 01, 2007 2:49 pm

14 Replies

27105 Views

Last post by Frank
Thu May 26, 2011 2:08 pm
iPhone App

Last post by Barbra Voltaire, FGG « Fri Feb 11, 2011 7:06 pm
Replies: 3
by lukass » Thu Feb 10, 2011 11:06 am

3 Replies

8072 Views

Last post by Barbra Voltaire, FGG
Fri Feb 11, 2011 7:06 pm
Hard and soft moissanite?

Last post by Barbra Voltaire, FGG « Thu Feb 10, 2011 12:14 pm
Replies: 14
by zen » Wed Dec 22, 2010 1:40 am

14 Replies

13991 Views

Last post by Barbra Voltaire, FGG
Thu Feb 10, 2011 12:14 pm
An Interview with George Rossman

Last post by Barbra Voltaire, FGG « Tue Feb 08, 2011 10:50 pm

by Barbra Voltaire, FGG » Tue Feb 08, 2011 10:50 pm

0 Replies

7328 Views

Last post by Barbra Voltaire, FGG
Tue Feb 08, 2011 10:50 pm

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