Research

Moderators: Stephen Challener, Barbra Voltaire, FGG, Alberto

New Topic

94 topics

Topics

Replies

Views

Last post

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

24325 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

34001 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

22342 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

10619 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

18610 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

7915 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

3223 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

3029 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

4214 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

2797 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

3462 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

3064 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

2926 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

4064 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

3382 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

3774 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

3245 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

3211 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

6968 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

5080 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

9075 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

4758 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

13953 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

4672 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

3895 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

3764 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

7282 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

10268 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

12148 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

5114 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

5095 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

5653 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

4026 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

6701 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

38085 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

6659 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

8317 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

48967 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

23365 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

5443 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

11705 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

8855 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

7352 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

22530 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

4778 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

23556 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

5578 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

10821 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

5052 Views

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

Last post by zen « Tue Jan 25, 2011 2:48 am
Replies: 19
by Brian » Tue Apr 28, 2009 4:54 pm
1

2
19 Replies

26287 Views

Last post by zen
Tue Jan 25, 2011 2:48 am

New Topic

94 topics

Return to Board Index

Forum permissions

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