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Frequently Asked Questions (FAQ) / How many Gemstone Types

How many different kinds of gems are there in the world?

This is not an easy question to answer in a definitive way, but the latest edition of Walter Schumann's Gemstones of the World lists about 200 different varieties of natural gemstones. We currently stock about 130 varieties, but our eventual goal is to stock every known kind of gemstone, as soon as we can find them.

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  • First Published: February-20-2006
  • Last Updated: November-11-2014
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Size and Weight

Gems are always measured in Millimeter (mm)

Dimensions are given as;
length x width x depth,
except for round stones which are;
diameter x depth

Select gems by size, not by weight!
Gem varieties vary in density, so carat weight is not a good indication of size

Note: 1ct = 0.2g

Size Comparison Chart