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Why no green quartz coloured by chromophore elements in nature ?

Last post by cascaillou « Sun Mar 08, 2026 7:38 am
Replies: 2
by cascaillou » Sat Mar 07, 2026 6:53 pm

2 Replies

169 Views

Last post by cascaillou
Sun Mar 08, 2026 7:38 am
Saphiret

Last post by steinfroilein « Tue Jul 29, 2025 6:48 am
Replies: 4
by steinfroilein » Sat Jul 19, 2025 11:48 am

4 Replies

7322 Views

Last post by steinfroilein
Tue Jul 29, 2025 6:48 am
Kornerupin from Vietnam

Last post by chrisP « Mon May 26, 2025 5:04 am
Replies: 4
by chrisP » Tue May 13, 2025 3:20 am

4 Replies

34994 Views

Last post by chrisP
Mon May 26, 2025 5:04 am
Confusing gemstone report

Last post by Barbra Voltaire, FGG « Sat May 10, 2025 12:37 pm
Replies: 4
by chrisP » Wed May 07, 2025 10:48 am

4 Replies

53950 Views

Last post by Barbra Voltaire, FGG
Sat May 10, 2025 12:37 pm
Now Here Is Something Interesting

Last post by dchallener « Wed Mar 26, 2025 8:18 pm
Replies: 7
by Solomon » Fri Jul 07, 2017 12:23 pm

7 Replies

13646 Views

Last post by dchallener
Wed Mar 26, 2025 8:18 pm
Ideas of what this could be?

Last post by S. Rautiainen « Mon May 27, 2024 1:09 pm
Replies: 1
by Greenbird » Sun May 19, 2024 3:54 am

1 Replies

17754 Views

Last post by S. Rautiainen
Mon May 27, 2024 1:09 pm
X-ray fluorescence (XRF) used by coin dealers

Last post by roshanravan « Mon Apr 22, 2024 4:30 pm
Replies: 14
by Barbra Voltaire, FGG » Fri Mar 15, 2024 6:37 pm

14 Replies

12288 Views

Last post by roshanravan
Mon Apr 22, 2024 4:30 pm
Looking for an appraiser

Last post by Barbra Voltaire, FGG « Fri Feb 23, 2024 2:49 pm
Replies: 8
by dchallener » Mon Feb 05, 2024 7:11 pm

8 Replies

7040 Views

Last post by Barbra Voltaire, FGG
Fri Feb 23, 2024 2:49 pm
Is this black zircon?

Last post by Stephen Challener « Sun Feb 18, 2024 5:55 pm
Replies: 1
by CleavageFeavage » Mon Feb 12, 2024 9:00 pm

1 Replies

3752 Views

Last post by Stephen Challener
Sun Feb 18, 2024 5:55 pm
Carbonado black diamond meteorite (?)

Last post by Ast530 « Sat Feb 03, 2024 1:07 am
Replies: 1
by russelljds » Wed Jan 03, 2024 3:26 pm

1 Replies

6132 Views

Last post by Ast530
Sat Feb 03, 2024 1:07 am
Interesting Stone/artifact

Last post by Dor « Fri Dec 29, 2023 10:56 am

by Dor » Fri Dec 29, 2023 10:56 am

0 Replies

11964 Views

Last post by Dor
Fri Dec 29, 2023 10:56 am
Can You Please Identify this Stone? TY

Last post by Ezeepass « Fri Dec 08, 2023 7:19 pm
Replies: 2
by Ezeepass » Fri Dec 08, 2023 1:54 pm

2 Replies

5955 Views

Last post by Ezeepass
Fri Dec 08, 2023 7:19 pm
What does this appraisal mean?

Last post by 1bwana1 « Tue Oct 03, 2023 11:59 pm
Replies: 3
by dchallener » Tue Oct 03, 2023 1:02 pm

3 Replies

8249 Views

Last post by 1bwana1
Tue Oct 03, 2023 11:59 pm
Ideas to the possible value of this large Emerald?

Last post by glhays « Mon Mar 13, 2023 5:47 pm
Replies: 10
by Chipper1958 » Sun Mar 12, 2023 1:49 pm

10 Replies

13443 Views

Last post by glhays
Mon Mar 13, 2023 5:47 pm
Purchased as tourmaline and aqua.

Last post by Jeffreyaz « Fri Feb 17, 2023 11:30 pm
Replies: 15
by Jeffreyaz » Sat Feb 11, 2023 11:45 pm
1

2
15 Replies

12182 Views

Last post by Jeffreyaz
Fri Feb 17, 2023 11:30 pm
Mystery Specimen

Last post by Barbra Voltaire, FGG « Wed Aug 24, 2022 7:41 pm
Replies: 7
by Barbra Voltaire, FGG » Tue Aug 23, 2022 9:40 pm

7 Replies

11478 Views

Last post by Barbra Voltaire, FGG
Wed Aug 24, 2022 7:41 pm
Spinel…synthetic?

Last post by arglthesheep « Fri Jul 08, 2022 1:39 am
Replies: 2
by natashacgem » Wed Jul 06, 2022 1:07 pm

2 Replies

10919 Views

Last post by arglthesheep
Fri Jul 08, 2022 1:39 am
Hollow form jewelry versus electroformed over resin jewelry

Last post by glhays « Mon Jun 06, 2022 12:52 pm
Replies: 7
by jlgulledge » Fri Jun 03, 2022 5:22 pm

7 Replies

13295 Views

Last post by glhays
Mon Jun 06, 2022 12:52 pm
ISO Gemology Microscopes, please....

Last post by glhays « Sat Mar 26, 2022 8:29 pm
Replies: 2
by QIA » Fri Mar 25, 2022 7:17 pm

2 Replies

6693 Views

Last post by glhays
Sat Mar 26, 2022 8:29 pm
Rutile Silk?

Last post by Barbra Voltaire, FGG « Thu Mar 17, 2022 10:23 pm
Replies: 5
by rogerg » Thu Mar 17, 2022 9:34 pm

5 Replies

5930 Views

Last post by Barbra Voltaire, FGG
Thu Mar 17, 2022 10:23 pm
Hydrogrossular confusions

Last post by PL01 « Tue Nov 16, 2021 4:01 pm
Replies: 21
by PL01 » Fri Nov 05, 2021 7:39 am
1

2
21 Replies

15866 Views

Last post by PL01
Tue Nov 16, 2021 4:01 pm
Questions About Sapphires

Last post by Barbra Voltaire, FGG « Sun Oct 10, 2021 1:10 pm
Replies: 23
by Arami » Mon Oct 04, 2021 9:28 pm
1

2
23 Replies

13925 Views

Last post by Barbra Voltaire, FGG
Sun Oct 10, 2021 1:10 pm
Large Stone found in SE Virginia

Last post by Stephen Challener « Wed Oct 06, 2021 11:17 pm
Replies: 2
by norseman » Wed Oct 06, 2021 6:26 pm

2 Replies

4665 Views

Last post by Stephen Challener
Wed Oct 06, 2021 11:17 pm
Anyone know this stone or crystal

Last post by Barbra Voltaire, FGG « Thu Sep 30, 2021 2:21 pm
Replies: 1
by Megancline86 » Wed Sep 29, 2021 6:11 pm

1 Replies

4715 Views

Last post by Barbra Voltaire, FGG
Thu Sep 30, 2021 2:21 pm
crystal quartz with unusual form

Last post by sangshenas « Tue Jul 27, 2021 7:17 am
Replies: 3
by sangshenas » Mon Jul 26, 2021 8:36 am

3 Replies

7758 Views

Last post by sangshenas
Tue Jul 27, 2021 7:17 am
which is this kind of stone

Last post by Brian « Wed Jun 16, 2021 3:50 pm
Replies: 6
by Toni46424 » Sat Jun 12, 2021 4:23 am

6 Replies

8512 Views

Last post by Brian
Wed Jun 16, 2021 3:50 pm
Can you help me with identifycation the stone, please ?

Last post by glhays « Tue Jun 01, 2021 9:55 pm
Replies: 19
by Wilhelm » Thu Feb 25, 2021 3:07 am
1

2
19 Replies

17367 Views

Last post by glhays
Tue Jun 01, 2021 9:55 pm
Yellowing opal

Last post by 1bwana1 « Wed May 26, 2021 8:26 pm
Replies: 16
by SarahM2718 » Fri May 21, 2021 7:12 pm
1

2
16 Replies

29072 Views

Last post by 1bwana1
Wed May 26, 2021 8:26 pm
Reversible Tenebrescence Revisited

Last post by Barbra Voltaire, FGG « Thu May 13, 2021 9:25 pm
Replies: 2
by Barbra Voltaire, FGG » Thu May 13, 2021 3:18 pm

2 Replies

8852 Views

Last post by Barbra Voltaire, FGG
Thu May 13, 2021 9:25 pm
New from Afghanistan Mine

Last post by Icehut « Sun May 09, 2021 11:53 pm
Replies: 10
by j.mcgee_1985 » Thu Mar 11, 2021 12:30 am

10 Replies

13363 Views

Last post by Icehut
Sun May 09, 2021 11:53 pm
MDR Machine

Last post by j.mcgee_1985 « Tue Mar 23, 2021 1:56 pm
Replies: 5
by j.mcgee_1985 » Mon Mar 22, 2021 2:57 pm

5 Replies

12426 Views

Last post by j.mcgee_1985
Tue Mar 23, 2021 1:56 pm
Chip and possible fracture? Sapphire question...

Last post by Barbra Voltaire, FGG « Tue Jan 05, 2021 4:49 pm
Replies: 14
by jolielaide » Sun Jan 03, 2021 3:49 pm

14 Replies

18272 Views

Last post by Barbra Voltaire, FGG
Tue Jan 05, 2021 4:49 pm
Anyone know what this is?

Last post by 1bwana1 « Wed Dec 23, 2020 7:45 pm
Replies: 3
by janiern555 » Thu Nov 12, 2020 2:49 pm

3 Replies

15223 Views

Last post by 1bwana1
Wed Dec 23, 2020 7:45 pm
Anyone know what this is?

Last post by glhays « Wed Dec 23, 2020 6:41 pm
Replies: 1
by janiern555 » Thu Nov 12, 2020 2:21 pm

1 Replies

13685 Views

Last post by glhays
Wed Dec 23, 2020 6:41 pm
Identification help

Last post by Stephen Challener « Mon Dec 21, 2020 2:02 pm
Replies: 3
by D2THEAVID » Thu Dec 17, 2020 11:54 pm

3 Replies

12397 Views

Last post by Stephen Challener
Mon Dec 21, 2020 2:02 pm
Help please

Last post by dchallener « Fri Dec 18, 2020 12:28 pm
Replies: 7
by D2THEAVID » Thu Dec 17, 2020 4:09 pm

7 Replies

11246 Views

Last post by dchallener
Fri Dec 18, 2020 12:28 pm
Anyone know what this is?

Last post by Barbra Voltaire, FGG « Fri Nov 13, 2020 3:05 pm
Replies: 3
by janiern555 » Thu Nov 12, 2020 2:31 pm

3 Replies

9948 Views

Last post by Barbra Voltaire, FGG
Fri Nov 13, 2020 3:05 pm
Curious

Last post by abeck « Mon Nov 02, 2020 6:59 pm
Replies: 8
by AliciaLynn03 » Sat Oct 31, 2020 5:23 am

8 Replies

7138 Views

Last post by abeck
Mon Nov 02, 2020 6:59 pm
gemstone hardness

Last post by Barbra Voltaire, FGG « Fri Oct 23, 2020 1:13 pm
Replies: 30
by nirmala-raman » Sun Sep 11, 2011 1:11 pm
1

2

3
30 Replies

31855 Views

Last post by Barbra Voltaire, FGG
Fri Oct 23, 2020 1:13 pm
Spessartite Garnet Extradinaire

Last post by Barbra Voltaire, FGG « Mon Oct 12, 2020 7:34 pm
Replies: 4
by Barbra Voltaire, FGG » Mon Oct 12, 2020 2:16 pm

4 Replies

5933 Views

Last post by Barbra Voltaire, FGG
Mon Oct 12, 2020 7:34 pm
Can Someone ID this Crystal

Last post by Stephen Challener « Wed Sep 30, 2020 10:50 pm
Replies: 7
by glhays » Mon Sep 28, 2020 9:26 pm

7 Replies

6237 Views

Last post by Stephen Challener
Wed Sep 30, 2020 10:50 pm
Natural Ruby

Last post by Barbra Voltaire, FGG « Fri Sep 25, 2020 4:18 pm
Replies: 15
by Diacutter » Wed Sep 23, 2020 11:59 am
1

2
15 Replies

10381 Views

Last post by Barbra Voltaire, FGG
Fri Sep 25, 2020 4:18 pm
Help in identify needed

Last post by 1bwana1 « Wed Sep 16, 2020 2:53 pm
Replies: 17
by Bigiiii » Sat Sep 05, 2020 4:48 am
1

2
17 Replies

11522 Views

Last post by 1bwana1
Wed Sep 16, 2020 2:53 pm
Cleaning Ethiopian opal beads

Last post by Barbra Voltaire, FGG « Fri Sep 11, 2020 12:41 pm
Replies: 2
by Barbra Voltaire, FGG » Fri Sep 11, 2020 1:28 am

2 Replies

4996 Views

Last post by Barbra Voltaire, FGG
Fri Sep 11, 2020 12:41 pm
identifying tumbled stones from south africa

Last post by Stephen Challener « Wed Sep 02, 2020 11:23 pm
Replies: 11
by kimmychristine » Tue Sep 01, 2020 12:47 pm

11 Replies

6875 Views

Last post by Stephen Challener
Wed Sep 02, 2020 11:23 pm
Carat loss on recut

Last post by glhays « Sat Aug 08, 2020 4:47 pm
Replies: 4
by Cinnabar » Sat Aug 08, 2020 1:08 am

4 Replies

6214 Views

Last post by glhays
Sat Aug 08, 2020 4:47 pm
Green Jadeite Bangle and Other Pieces

Last post by danielle « Fri Jul 17, 2020 4:38 am
Replies: 3
by Camilo23 » Tue Jul 14, 2020 8:32 pm

3 Replies

5862 Views

Last post by danielle
Fri Jul 17, 2020 4:38 am
Jadeite bangle and nephrite necklace help please.

Last post by Barbra Voltaire, FGG « Wed Jul 15, 2020 3:54 pm
Replies: 18
by Ralfrey » Tue May 31, 2011 1:14 pm
1

2
18 Replies

18825 Views

Last post by Barbra Voltaire, FGG
Wed Jul 15, 2020 3:54 pm
Why do hydrothermal synthetics look so weird?

Last post by Mandira « Thu Jul 09, 2020 9:03 pm
Replies: 9
by Mandira » Fri Jun 26, 2020 9:13 am

9 Replies

8780 Views

Last post by Mandira
Thu Jul 09, 2020 9:03 pm
rosarita red

Last post by gembug « Fri Jun 12, 2020 2:37 am
Replies: 6
by steve5542 » Mon May 18, 2020 12:19 pm

6 Replies

7670 Views

Last post by gembug
Fri Jun 12, 2020 2:37 am

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