Gemmolgy Discussions are held on a regular basis.
They are open to anyone and are ALWAYS free of charge.
Click HERE for specifics on an upcoming topic.
Click HERE to go directly to the chat room.
New Chat's with Brian, Tim and Frank in .pdf format.
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Physics Chat: Light Wave or Particle
of Past Gemmology Chats
Hosted by Alain vanAcker:
on the links for the full text of previous chats!
Tom Chatham on Teminology: Created vs. Synthetic
Richard Drucker & Stuart Robertson
Vincent Pardieu 1
Vincent Pardieu 2
Richard W. Wise
General Gemmology Chats
(Roundtable tutorials on topics of gemmological importance)
Geology as it Relates to Gemmology:Building Blocks of Gems
Chemical Composition of Gems
Hardness & Specific Gravity
Specific Gravity 2.
Specific Gravity 3
Nature of Light
Timezones: Coordinating Chat-Times
Study Tips for Gemmology
Form & Habit, continued
Guest Guru: Ars: Gemstone Cutting & More
Guest Guru: Classy Carat: Visual Optics
Visual Gemmology, continued
Colour in Gemstones
Beryl & Related topics
Beryl & Related topics 2
Beryl & Related topics 3
Beryl 4 :The End
Isomorphous Replacement in Garnet
Isomorphous Replacement in Garnet 2
Quartz evolving into Fraunhofer lines
Enantiomorphism, pyro- and piezoelectricity
Tourmaline, continued (The Kerez Effect)
Chrysoberyl, Alexandrite and Cymophane
Basics of Atoms, Isotopes & Shells
Intervalence Charge Transfers
Critical Angles and Total Internal Reflection
Gem-A Final Review Tutoring Session 1
Causes of colour - crystal field theory
Causes of Color:charge transfer
Causes of Color:band gap theory
Colour grading in coloured stones
Clarity grading in coloured stones
Practical use of the retardation plate