Gems

carat, point, precious gem, semi-precious gem, kimberlite, alluvial deposit, refractive index

emerald, ruby, sapphire, YAG, GGG, CZ

What is a gem?

What properties do gems tend to possess?

Name 10 minerals that can be gems.

Where, geographically, are the best places to find diamond? What are two types of geological settings for diamonds?

What are the 4 c’s of diamonds?

How can gems be treated to increase their value? Do these methods always work?

When was cubic zirconia introduced and why is it a good diamond substitute?