How Many Different Types of Precious Gems Are There On Earth?

Gems are valuable, but some are much more valuable than others.

Such gems as topaz, aquamarine, and garnet are called semi-precious, and cost much less than precious gems.

There are only four minerals that are considered precious gems today: diamond, emerald, and two forms of corundum, ruby and sapphire.

Pearl, which is not a mineral but the product of oysters, is also called a precious gem.

About Karen Hill

Karen Hill is a freelance writer, editor, and columnist. Born in New York, her work has appeared in the Examiner, Yahoo News, Buzzfeed, among others.

2 thoughts on “How Many Different Types of Precious Gems Are There On Earth?”

  1. But I don’t understand how old, pressurized carbon (a diamond) can be considered as a precious gem? And isn’t only expensive because the supply of diamonds is restricted?

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