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How to tell if an Opal is Natural or Synthetic?

Last post by ArmoniaGems « Mon Nov 03, 2025 5:06 am
Posted in Gemology Online Chats

by ArmoniaGems » Mon Nov 03, 2025 5:06 am » in Gemology Online Chats

0 Replies

71 Views

Last post by ArmoniaGems
Mon Nov 03, 2025 5:06 am
What do you think about Ethiopian opal jewelry?

Last post by ArmoniaGems « Fri Oct 24, 2025 3:42 am
Posted in Gemology Online Chats

by ArmoniaGems » Fri Oct 24, 2025 3:42 am » in Gemology Online Chats

0 Replies

39 Views

Last post by ArmoniaGems
Fri Oct 24, 2025 3:42 am
The 58th Annual Gem, Mineral, Fossil, Jewelry, & Bead Show

Last post by rtracey « Wed Oct 08, 2025 1:42 pm
Posted in Upcoming Shows & Events

by rtracey » Wed Oct 08, 2025 1:42 pm » in Upcoming Shows & Events

0 Replies

903 Views

Last post by rtracey
Wed Oct 08, 2025 1:42 pm
Concerning concave facetting

Last post by C.Sanwill « Wed Sep 17, 2025 1:07 am
Posted in Lapidary Corner: Colored Stones

by C.Sanwill » Wed Sep 17, 2025 1:07 am » in Lapidary Corner: Colored Stones

0 Replies

714 Views

Last post by C.Sanwill
Wed Sep 17, 2025 1:07 am
Hardrock Summit 2025

Last post by path914 « Fri Aug 15, 2025 6:17 pm
Posted in Upcoming Shows & Events

by path914 » Fri Aug 15, 2025 6:17 pm » in Upcoming Shows & Events

0 Replies

2524 Views

Last post by path914
Fri Aug 15, 2025 6:17 pm
A Lesson in Jewelry History

Last post by Barbra Voltaire, FGG « Wed Jul 16, 2025 12:42 am
Posted in Vintage & Antique Gemstones, Jewellery and Obects D'Art

by Barbra Voltaire, FGG » Wed Jul 16, 2025 12:42 am » in Vintage & Antique Gemstones, Jewellery and Obects D'Art

0 Replies

2112 Views

Last post by Barbra Voltaire, FGG
Wed Jul 16, 2025 12:42 am
GIA to Use New Descriptive Terminology for Laboratory-Grown Diamonds

Last post by Barbra Voltaire, FGG « Sat Jul 12, 2025 1:31 pm
Posted in Diamonds

by Barbra Voltaire, FGG » Sat Jul 12, 2025 1:31 pm » in Diamonds

0 Replies

2394 Views

Last post by Barbra Voltaire, FGG
Sat Jul 12, 2025 1:31 pm
Free Appraisal Cources Offered until October

Last post by Barbra Voltaire, FGG « Fri Jun 27, 2025 12:45 pm
Posted in Appraiser's Corner

by Barbra Voltaire, FGG » Fri Jun 27, 2025 12:45 pm » in Appraiser's Corner

0 Replies

25401 Views

Last post by Barbra Voltaire, FGG
Fri Jun 27, 2025 12:45 pm
GemQuest High Performance Gemmological Scholarship Program

Last post by GlobalTraveller007 « Tue Jun 03, 2025 8:06 pm
Posted in World Gem Foundation

by GlobalTraveller007 » Tue Jun 03, 2025 8:06 pm » in World Gem Foundation

0 Replies

5246 Views

Last post by GlobalTraveller007
Tue Jun 03, 2025 8:06 pm
ASJRA Annual Conference

Last post by Barbra Voltaire, FGG « Wed Apr 23, 2025 9:50 pm
Posted in Vintage & Antique Gemstones, Jewellery and Obects D'Art

by Barbra Voltaire, FGG » Wed Apr 23, 2025 9:50 pm » in Vintage & Antique Gemstones, Jewellery and Obects D'Art

0 Replies

4612 Views

Last post by Barbra Voltaire, FGG
Wed Apr 23, 2025 9:50 pm
Measuring gem dimensions with laser

Last post by iwakasu « Mon Mar 24, 2025 5:34 am
Posted in Gem Equipment

by iwakasu » Mon Mar 24, 2025 5:34 am » in Gem Equipment

0 Replies

5771 Views

Last post by iwakasu
Mon Mar 24, 2025 5:34 am
A heat treated Kashan flux synthetic ruby

Last post by Dioptase « Tue Mar 18, 2025 10:42 pm
Posted in Lotus Gemology

by Dioptase » Tue Mar 18, 2025 10:42 pm » in Lotus Gemology

0 Replies

12080 Views

Last post by Dioptase
Tue Mar 18, 2025 10:42 pm
GT Podicles - The New Era of Gemmology Today

Last post by GlobalTraveller007 « Thu Mar 06, 2025 2:08 pm
Posted in World Gem Foundation

by GlobalTraveller007 » Thu Mar 06, 2025 2:08 pm » in World Gem Foundation

0 Replies

8202 Views

Last post by GlobalTraveller007
Thu Mar 06, 2025 2:08 pm
The Art of Moissanite Cutting

Last post by Azard_faza « Wed Feb 26, 2025 5:01 am
Posted in Diamonds

by Azard_faza » Wed Feb 26, 2025 5:01 am » in Diamonds

0 Replies

6724 Views

Last post by Azard_faza
Wed Feb 26, 2025 5:01 am
Cutting Oregon Sunstones: A Step-by-Step Guide

Last post by Azard_faza « Thu Nov 07, 2024 5:10 am
Posted in Gemology Online Chats

by Azard_faza » Thu Nov 07, 2024 5:10 am » in Gemology Online Chats

0 Replies

8879 Views

Last post by Azard_faza
Thu Nov 07, 2024 5:10 am
Coming Soon! 5th Edition Printed Three-Volume Set

Last post by GlobalTraveller007 « Sun Oct 13, 2024 12:43 pm
Posted in Collecting Gem & Jewelry Books

by GlobalTraveller007 » Sun Oct 13, 2024 12:43 pm » in Collecting Gem & Jewelry Books

0 Replies

5927 Views

Last post by GlobalTraveller007
Sun Oct 13, 2024 12:43 pm
Inside Out | Journey into the Center of a Gem: BILLY HUGHES

Last post by Barbra Voltaire, FGG « Thu Oct 10, 2024 12:05 pm
Posted in Lotus Gemology

by Barbra Voltaire, FGG » Thu Oct 10, 2024 12:05 pm » in Lotus Gemology

0 Replies

8058 Views

Last post by Barbra Voltaire, FGG
Thu Oct 10, 2024 12:05 pm
Equipment advice…

Last post by RickR134 « Mon Oct 07, 2024 6:42 pm
Posted in Beginners Only!

by RickR134 » Mon Oct 07, 2024 6:42 pm » in Beginners Only!

0 Replies

4395 Views

Last post by RickR134
Mon Oct 07, 2024 6:42 pm
Ugly stone from Madagascar

Last post by Curious-George « Mon Oct 07, 2024 11:29 am
Posted in Stone and Inclusion Photos

by Curious-George » Mon Oct 07, 2024 11:29 am » in Stone and Inclusion Photos

0 Replies

16763 Views

Last post by Curious-George
Mon Oct 07, 2024 11:29 am
Microscope

Last post by Sparkles66 « Sun Aug 25, 2024 11:19 am
Posted in Gem Equipment

by Sparkles66 » Sun Aug 25, 2024 11:19 am » in Gem Equipment

0 Replies

45480 Views

Last post by Sparkles66
Sun Aug 25, 2024 11:19 am
2024 Baltimore Gem Mineral Fossil Show

Last post by Teresa W « Mon Jul 08, 2024 2:37 pm
Posted in Upcoming Shows & Events

by Teresa W » Mon Jul 08, 2024 2:37 pm » in Upcoming Shows & Events

0 Replies

4955 Views

Last post by Teresa W
Mon Jul 08, 2024 2:37 pm
Could these stones be nephrite Jade? How to know?

Last post by Greenbird « Fri May 17, 2024 7:40 pm
Posted in Identification of Stones with Overlapping Characteristics

by Greenbird » Fri May 17, 2024 7:40 pm » in Identification of Stones with Overlapping Characteristics

0 Replies

22561 Views

Last post by Greenbird
Fri May 17, 2024 7:40 pm
Color changing garnet ?

Last post by Owlx « Thu Feb 22, 2024 2:49 pm
Posted in Colored Stones

by Owlx » Thu Feb 22, 2024 2:49 pm » in Colored Stones

0 Replies

12519 Views

Last post by Owlx
Thu Feb 22, 2024 2:49 pm
Orangemonkie Foldio 360

Last post by chrisP « Sun Jan 21, 2024 8:44 am
Posted in Stone and Inclusion Photos

by chrisP » Sun Jan 21, 2024 8:44 am » in Stone and Inclusion Photos

0 Replies

6923 Views

Last post by chrisP
Sun Jan 21, 2024 8:44 am
Interesting Stone/artifact

Last post by Dor « Fri Dec 29, 2023 10:56 am
Posted in Questions for the Experts

by Dor » Fri Dec 29, 2023 10:56 am » in Questions for the Experts

0 Replies

6222 Views

Last post by Dor
Fri Dec 29, 2023 10:56 am
Out of Bankruptcy

Last post by Edward Bristol « Fri Nov 17, 2023 1:52 am
Posted in Employment Opportunities

by Edward Bristol » Fri Nov 17, 2023 1:52 am » in Employment Opportunities

0 Replies

22595 Views

Last post by Edward Bristol
Fri Nov 17, 2023 1:52 am
IDEX Polished Price Index Hits Lowest Level Since 2008

Last post by Barbra Voltaire, FGG « Mon Sep 11, 2023 11:49 am
Posted in Diamonds

by Barbra Voltaire, FGG » Mon Sep 11, 2023 11:49 am » in Diamonds

0 Replies

9925 Views

Last post by Barbra Voltaire, FGG
Mon Sep 11, 2023 11:49 am
Flux melt red spinel

Last post by GlobalTraveller007 « Sun Aug 20, 2023 1:43 pm
Posted in Synthetics and Treatments

by GlobalTraveller007 » Sun Aug 20, 2023 1:43 pm » in Synthetics and Treatments

0 Replies

12010 Views

Last post by GlobalTraveller007
Sun Aug 20, 2023 1:43 pm
A Brief History of the Zip Necklace

Last post by Barbra Voltaire, FGG « Thu Jul 27, 2023 12:04 pm
Posted in Vintage & Antique Gemstones, Jewellery and Obects D'Art

by Barbra Voltaire, FGG » Thu Jul 27, 2023 12:04 pm » in Vintage & Antique Gemstones, Jewellery and Obects D'Art

0 Replies

20935 Views

Last post by Barbra Voltaire, FGG
Thu Jul 27, 2023 12:04 pm
China Crystalline Treasures Book

Last post by danielle « Wed Jul 12, 2023 5:01 am
Posted in Useful Links

by danielle » Wed Jul 12, 2023 5:01 am » in Useful Links

0 Replies

37531 Views

Last post by danielle
Wed Jul 12, 2023 5:01 am
Nigerian Emeralds: Buyers Beware

Last post by Barbra Voltaire, FGG « Mon Jul 03, 2023 10:25 pm
Posted in Synthetics and Treatments

by Barbra Voltaire, FGG » Mon Jul 03, 2023 10:25 pm » in Synthetics and Treatments

0 Replies

9269 Views

Last post by Barbra Voltaire, FGG
Mon Jul 03, 2023 10:25 pm
GemGenève May 11-14 2023

Last post by Dioptase « Thu May 04, 2023 10:49 pm
Posted in Upcoming Shows & Events

by Dioptase » Thu May 04, 2023 10:49 pm » in Upcoming Shows & Events

0 Replies

10553 Views

Last post by Dioptase
Thu May 04, 2023 10:49 pm
Grade and Rate Diamond Transparency

Last post by G Holloway Cut Nut « Wed Apr 12, 2023 9:20 pm
Posted in GIA (Gemological Institute of America)

by G Holloway Cut Nut » Wed Apr 12, 2023 9:20 pm » in GIA (Gemological Institute of America)

0 Replies

21640 Views

Last post by G Holloway Cut Nut
Wed Apr 12, 2023 9:20 pm
Facet design called "Robin"

Last post by salik « Wed Mar 01, 2023 5:31 am
Posted in Lapidary Corner: Colored Stones

by salik » Wed Mar 01, 2023 5:31 am » in Lapidary Corner: Colored Stones

0 Replies

11370 Views

Last post by salik
Wed Mar 01, 2023 5:31 am
Displacement After Earthquake in Turkey

Last post by Barbra Voltaire, FGG « Thu Feb 16, 2023 3:16 pm
Posted in General Discussions

by Barbra Voltaire, FGG » Thu Feb 16, 2023 3:16 pm » in General Discussions

0 Replies

21125 Views

Last post by Barbra Voltaire, FGG
Thu Feb 16, 2023 3:16 pm
2023 Tucson Gem Mineral Show

Last post by Greenspinel « Tue Jan 10, 2023 6:35 pm
Posted in TUCSON GEM SHOWS 2022-2025 SPECIAL SECTION

by Greenspinel » Tue Jan 10, 2023 6:35 pm » in TUCSON GEM SHOWS 2022-2025 SPECIAL SECTION

0 Replies

20720 Views

Last post by Greenspinel
Tue Jan 10, 2023 6:35 pm
GIA Teams with Alan Revere to Revamp Graduate Jeweler Class

Last post by Barbra Voltaire, FGG « Wed Dec 28, 2022 2:41 pm
Posted in Jeweler's Bench

by Barbra Voltaire, FGG » Wed Dec 28, 2022 2:41 pm » in Jeweler's Bench

0 Replies

21204 Views

Last post by Barbra Voltaire, FGG
Wed Dec 28, 2022 2:41 pm
An Update on Sapphires with Unstable Color

Last post by Barbra Voltaire, FGG « Wed Dec 28, 2022 2:24 pm
Posted in Colored Stones

by Barbra Voltaire, FGG » Wed Dec 28, 2022 2:24 pm » in Colored Stones

0 Replies

13329 Views

Last post by Barbra Voltaire, FGG
Wed Dec 28, 2022 2:24 pm
CIBJO's Guide for Natural and Cultured Pearls

Last post by Barbra Voltaire, FGG « Sat Dec 03, 2022 1:22 pm
Posted in Organic Gems

by Barbra Voltaire, FGG » Sat Dec 03, 2022 1:22 pm » in Organic Gems

0 Replies

35536 Views

Last post by Barbra Voltaire, FGG
Sat Dec 03, 2022 1:22 pm
DeBeers Now Offers Diamond Grading

Last post by Barbra Voltaire, FGG « Wed Nov 30, 2022 1:05 pm
Posted in Diamonds

by Barbra Voltaire, FGG » Wed Nov 30, 2022 1:05 pm » in Diamonds

0 Replies

13617 Views

Last post by Barbra Voltaire, FGG
Wed Nov 30, 2022 1:05 pm
Facets Sri Lanka Gem and Jewelry show 2023

Last post by crescentgems « Thu Nov 17, 2022 10:44 am
Posted in Upcoming Shows & Events

by crescentgems » Thu Nov 17, 2022 10:44 am » in Upcoming Shows & Events

0 Replies

15699 Views

Last post by crescentgems
Thu Nov 17, 2022 10:44 am
Diamond mining results in environmental disaster

Last post by Barbra Voltaire, FGG « Thu Nov 03, 2022 12:21 pm
Posted in Diamonds

by Barbra Voltaire, FGG » Thu Nov 03, 2022 12:21 pm » in Diamonds

0 Replies

14182 Views

Last post by Barbra Voltaire, FGG
Thu Nov 03, 2022 12:21 pm
Imperial by Gem Instruments Faceting Machine

Last post by glhays « Mon Oct 31, 2022 4:58 pm
Posted in Lapidary Corner: Colored Stones

by glhays » Mon Oct 31, 2022 4:58 pm » in Lapidary Corner: Colored Stones

0 Replies

15642 Views

Last post by glhays
Mon Oct 31, 2022 4:58 pm
My design book, The Secret Teachings, back in stock

Last post by justinkprim « Thu Sep 22, 2022 10:04 am
Posted in Lapidary Corner: Colored Stones

by justinkprim » Thu Sep 22, 2022 10:04 am » in Lapidary Corner: Colored Stones

0 Replies

14438 Views

Last post by justinkprim
Thu Sep 22, 2022 10:04 am
Looking for Lee index

Last post by fedathc « Mon Sep 19, 2022 9:03 pm
Posted in Lapidary Corner: Colored Stones

by fedathc » Mon Sep 19, 2022 9:03 pm » in Lapidary Corner: Colored Stones

0 Replies

14801 Views

Last post by fedathc
Mon Sep 19, 2022 9:03 pm
Labor Day Well Wishes to all!

Last post by glhays « Mon Sep 05, 2022 12:20 am
Posted in Upcoming Shows & Events

by glhays » Mon Sep 05, 2022 12:20 am » in Upcoming Shows & Events

0 Replies

19540 Views

Last post by glhays
Mon Sep 05, 2022 12:20 am
USPAP Extended until December 31, 2023

Last post by Barbra Voltaire, FGG « Thu Aug 11, 2022 9:05 pm
Posted in Appraiser's Corner

by Barbra Voltaire, FGG » Thu Aug 11, 2022 9:05 pm » in Appraiser's Corner

0 Replies

33061 Views

Last post by Barbra Voltaire, FGG
Thu Aug 11, 2022 9:05 pm
Diamond Grading Lab NY

Last post by Sparkles66 « Fri Jul 15, 2022 6:26 am
Posted in GIA (Gemological Institute of America)

by Sparkles66 » Fri Jul 15, 2022 6:26 am » in GIA (Gemological Institute of America)

0 Replies

27175 Views

Last post by Sparkles66
Fri Jul 15, 2022 6:26 am
Gem Intro

Last post by Barbra Voltaire, FGG « Thu Jul 07, 2022 11:05 am
Posted in Gem-A (The Gemmological Association of Great Britain)

by Barbra Voltaire, FGG » Thu Jul 07, 2022 11:05 am » in Gem-A (The Gemmological Association of Great Britain)

0 Replies

63263 Views

Last post by Barbra Voltaire, FGG
Thu Jul 07, 2022 11:05 am
araiba like tourmaline, a misbegotten variety.

Last post by bruce_tourm « Mon Jul 04, 2022 6:46 am
Posted in Gems' Color

by bruce_tourm » Mon Jul 04, 2022 6:46 am » in Gems' Color

0 Replies

38127 Views

Last post by bruce_tourm
Mon Jul 04, 2022 6:46 am

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