SCHEDULE (ON-LINE)

MODULE 1

WHAT DO WE MEAND BY 'GEM'? AND WHERE ARE THEY FORMED IN THE EARTH?

(1a) Start the course materials here with: What is a gem?

(1b) Then go to: Where do gems form and where are they f ound?

open book quiz on (TBA) - to check understanding of Module 1 (What is a gem AND where do gems form).

MODULE 2

HOW DO WE USE UNDERSTANDING OF CRYSTALS TO IDENTIFY GEMS?

(2a) Now: What is a crystal?

(2b) and learn about How gems are identified

specific gravity, hardness, optical properties.

open book quiz date TBA on Module 2.

MODULE 3

POPULAR GEMS: THEIR VALUE, ENHANCEMENT, AND SYNTHESIS

(3a) GEMS: Diamond and diamond imitations

Mid Term (up to and including diamonds):

On date TBA at time (TBA) p.m. and (TBA) on TBA at a location TBA If you have a class conflict OR a serious personal situation that prevents your taking the quiz at these times, you should contact your TA in advance. If this is not possible, some documentation of the reason for your absence will be required in order to secure a make up time

MODULE 3 continued:

(3b) Color in minerals: basic science used to explain the origin of color in gems

(3c) Corundum: ruby and sapphire : asterism, heat treatment, diffusion etc.

(3d) Beryl varieties: emerald, aquamarine, morganite, goshenite, heli odor.

MODULE 4

OTHER POPULAR GEMS, RADIOACTIVITY IN GEMS, INCLUSIONS IN GEMS

(4a) Topaz

Topaz and gem modification by irradiation.

(4b) Zircon and radioactivity in gems.

(4c) Crysoberyl (cats eye, alexandrite), Rutile and Spinel

open book quiz date TBA on Modules 3 and 4

MODULE 5