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World Class Gems

Birthstones and gemstones, explained

Find your birthstone, and get to know it.

What each of the 21 modern birthstones is, its colors, where it comes from, how hard it is and how to clean it. Every fact comes from the Gemological Institute of America (GIA) or the American Gem Society (AGS), with links.

This month

November birthstones: Topaz and Citrine

Shopping for a November birthday? See the colors, which piece suits each stone, and how to care for it.

November birthstone guide Gift ideas

Where our facts come from

Hardness, toughness, cleaning and treatment notes come from GIA's care and cleaning guides. What each stone is, its colors, sources, history and name come from the American Gem Society's birthstone guides. Every gem page links to its sources, and anything they do not cover is left out. Last checked October 16, 2026. More about our method.

Birthstone of the month

A birthstone a month, by email

On the first of each month: that month's birthstone, what it means and how to care for it.

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