Gem Identification

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Poor Man's Polariscope

Last post by PinkDiamond « Wed Feb 10, 2021 9:57 pm
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by PinkDiamond » Fri Apr 08, 2016 7:01 pm

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Wed Feb 10, 2021 9:57 pm
Gem-A Instruments Now Distributor for GemPen

Last post by PinkDiamond « Sun Nov 15, 2020 8:21 pm

by PinkDiamond » Sun Nov 15, 2020 8:21 pm

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718 Views

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Sun Nov 15, 2020 8:21 pm
ISG Free Mini-Course Program is BACK!

Last post by SwordfishMining « Fri Sep 04, 2020 12:39 am
Replies: 1
by PinkDiamond » Thu Sep 03, 2020 5:46 pm

1 Replies

661 Views

Last post by SwordfishMining View the latest post
Fri Sep 04, 2020 12:39 am
ISG: Seeing the Invisible Light

Last post by PinkDiamond « Thu Jun 25, 2020 5:57 pm

by PinkDiamond » Thu Jun 25, 2020 5:57 pm

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601 Views

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Thu Jun 25, 2020 5:57 pm
New FREE ISG Mini-Course: Chatham Created Gemstones

Last post by SwordfishMining « Mon Jun 15, 2020 3:06 am
Replies: 1
by PinkDiamond » Fri Jun 12, 2020 6:18 pm

1 Replies

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Last post by SwordfishMining View the latest post
Mon Jun 15, 2020 3:06 am
Identifying Lead/Cobalt Sapphires

Last post by PinkDiamond « Fri May 22, 2020 5:09 pm

by PinkDiamond » Fri May 22, 2020 5:09 pm

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256 Views

Last post by PinkDiamond View the latest post
Fri May 22, 2020 5:09 pm
The ISG Re-Launches with More Free Mini-Courses including Certificates of Completion

Last post by PinkDiamond « Mon May 11, 2020 6:01 pm
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by PinkDiamond » Sat May 09, 2020 8:12 pm

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Mon May 11, 2020 6:01 pm
GIA Offers FREE AJP Program!

Last post by PinkDiamond « Thu May 07, 2020 6:46 pm

by PinkDiamond » Thu May 07, 2020 6:46 pm

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Last post by PinkDiamond View the latest post
Thu May 07, 2020 6:46 pm
Introduction to Gemology Free mini course; new links

Last post by SwordfishMining « Fri May 01, 2020 7:00 pm
Replies: 1
Attachment(s) by PinkDiamond » Fri May 01, 2020 6:41 pm

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Last post by SwordfishMining View the latest post
Fri May 01, 2020 7:00 pm
Field Gemology & Geographic Origin: 5 Questions Answered

Last post by PinkDiamond « Thu Apr 30, 2020 5:06 pm

by PinkDiamond » Thu Apr 30, 2020 5:06 pm

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Thu Apr 30, 2020 5:06 pm
New ISG FREE Mini-Course Now Available: Introduction to Gemstone Treatments

Last post by PinkDiamond « Sat Apr 18, 2020 6:03 pm

by PinkDiamond » Sat Apr 18, 2020 6:03 pm

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Last post by PinkDiamond View the latest post
Sat Apr 18, 2020 6:03 pm
New ISG FREE Mini-Course Now Available: Introduction to Colored Gemstones

Last post by SwordfishMining « Sat Apr 11, 2020 3:14 am
Replies: 1
by PinkDiamond » Fri Apr 10, 2020 6:21 pm

1 Replies

373 Views

Last post by SwordfishMining View the latest post
Sat Apr 11, 2020 3:14 am
An alternative solution to continue the free ISG mini-courses

Last post by PinkDiamond « Sat Mar 28, 2020 8:21 pm

by PinkDiamond » Sat Mar 28, 2020 8:21 pm

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486 Views

Last post by PinkDiamond View the latest post
Sat Mar 28, 2020 8:21 pm
ISG Launches Mini-Course Program, now FREE

Last post by SwordfishMining « Sun Mar 22, 2020 3:39 pm
Replies: 3
by PinkDiamond » Sat Mar 21, 2020 4:48 pm

3 Replies

574 Views

Last post by SwordfishMining View the latest post
Sun Mar 22, 2020 3:39 pm
Colored Stones Grading & Pricing Course

Last post by PinkDiamond « Sat Mar 21, 2020 4:56 pm

by PinkDiamond » Sat Mar 21, 2020 4:56 pm

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335 Views

Last post by PinkDiamond View the latest post
Sat Mar 21, 2020 4:56 pm
Test Your Color Vision

Last post by rocks2dust « Wed Jan 22, 2020 8:32 pm
Replies: 2
by PinkDiamond » Wed Jan 22, 2020 7:05 pm

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887 Views

Last post by rocks2dust View the latest post
Wed Jan 22, 2020 8:32 pm
ISG Fun with the Refractometer

Last post by PinkDiamond « Tue Jan 14, 2020 7:08 pm

by PinkDiamond » Tue Jan 14, 2020 7:08 pm

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393 Views

Last post by PinkDiamond View the latest post
Tue Jan 14, 2020 7:08 pm
Investigation of Artificial Color Infusion of Gemstones

Last post by rocks2dust « Thu Jul 25, 2019 5:28 pm
Replies: 1
by PinkDiamond » Wed Jul 24, 2019 5:19 pm

1 Replies

1100 Views

Last post by rocks2dust View the latest post
Thu Jul 25, 2019 5:28 pm
IIJA: Meiji Techno Microscopes

Last post by PinkDiamond « Thu Jun 06, 2019 6:50 pm

by PinkDiamond » Thu Jun 06, 2019 6:50 pm

0 Replies

418 Views

Last post by PinkDiamond View the latest post
Thu Jun 06, 2019 6:50 pm
Update: International Gemstone Academy for Gemstone Dealers

Last post by PinkDiamond « Tue May 21, 2019 5:05 pm
Replies: 1
by PinkDiamond » Tue May 14, 2019 6:02 pm

1 Replies

446 Views

Last post by PinkDiamond View the latest post
Tue May 21, 2019 5:05 pm
Lessons From Dr. Hanneman!

Last post by PinkDiamond « Wed Mar 27, 2019 7:21 pm

by PinkDiamond » Wed Mar 27, 2019 7:21 pm

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402 Views

Last post by PinkDiamond View the latest post
Wed Mar 27, 2019 7:21 pm
The Artificial Color Infusion of Tourmaline

Last post by PinkDiamond « Fri Mar 22, 2019 7:28 pm

by PinkDiamond » Fri Mar 22, 2019 7:28 pm

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451 Views

Last post by PinkDiamond View the latest post
Fri Mar 22, 2019 7:28 pm
Lotus Gemology's Four Treasures database of trade references

Last post by PinkDiamond « Fri Feb 22, 2019 6:44 pm

by PinkDiamond » Fri Feb 22, 2019 6:44 pm

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404 Views

Last post by PinkDiamond View the latest post
Fri Feb 22, 2019 6:44 pm
Tabby extinction!

Last post by PinkDiamond « Tue Jan 08, 2019 7:22 pm

by PinkDiamond » Tue Jan 08, 2019 7:22 pm

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392 Views

Last post by PinkDiamond View the latest post
Tue Jan 08, 2019 7:22 pm
Is it chrome tourmaline...

Last post by crazy8s « Thu Oct 18, 2018 1:29 pm
Replies: 3
Attachment(s) by m76steve » Sat Oct 13, 2018 6:47 am

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Last post by crazy8s View the latest post
Thu Oct 18, 2018 1:29 pm

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