Roundtable
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
Index
of Past Gemmology Chats
Hosted by Alain vanAcker:
Click
on the links for the full text of previous chats!
Celebrity Chats
Cos Altobelli
Tom Chatham Tom Chatham on Teminology: Created vs. Synthetic
Richard Drucker & Stuart Robertson
Richard Hughes
Vincent Pardieu 1 Vincent Pardieu 2 Jolyon Ralph
Robert Weldon
Colin Winter
Richard W. Wise
General Gemmology Chats (Roundtable tutorials on topics of gemmological importance)
Famous Diamonds
Geology as it Relates to Gemmology:Building Blocks of Gems
Chemical Composition of Gems Crystallography Hardness & Specific Gravity Specific Gravity 2.
Specific Gravity 3
Nature of Light Timezones: Coordinating Chat-Times Study Tips for Gemmology
Form& Habit
Form & Habit, continued
Guest Guru: Ars: Gemstone Cutting & More
Optics
Polarization
Polarization 2
Polarization 3
Guest Guru: Classy Carat: Visual Optics
Visual Gemmology, continued
Colour in Gemstones
Pleochroism
Absorption Spectra
Luminescence
Practical Gemmology
Corundum
Corundum 2
Corundum 3
Beryl & Related topics
Beryl & Related topics 2
Beryl & Related topics 3
Beryl 4 :The End
Isomorphous Replacement in Garnet
Isomorphous Replacement in Garnet 2
Ugrandite Garnets
Quartz evolving into Fraunhofer lines
Enantiomorphism, pyro- and piezoelectricity
Tourmaline Group
Tourmaline, continued (The Kerez Effect)
Zircon
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
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