ISG Journey Thru Gemology: Introduction
April 19: Study of the Refractometer Part I
Here is the ISG Journey Thru Gemology Class for April 19.
ISG Journey Thru Gemology: Introduction
April 12: Crystal Systems
Here is the ISG Journey Thru Gemology Class for April 12.
ISG Journey Thru Gemology: Introduction
March 29: Gem Identification
Here is the ISG Journey Thru Gemology Class for March 29.