New to gemstones? Curious about the different kinds of gemstones? Check out our gemstones list and discover a world of precious and semi-precious stones.

Group of precious and semiprecious stones—both uncut and faceted—including (clockwise from top left) diamond, uncut synthetic sapphire, ruby, uncut emerald, and amethyst crystal cluster.

GIA’s Gem Encyclopedia is a virtual journey through the science and lore of gemstones from across the globe. Each precious stone page features additional detailed gemological …

Our gemstone list features over 200 precious and semi-precious varieties, a comprehensive index to find the ideal colored stone. Whether for jewelry, collecting, or crystal healing, this gemstone …

Jun 9, 2020 · The standard four precious gemstones aren’t the only beautiful gems. Plus, plenty of semi-precious stones are more valuable! Learn every precious and semi-precious gemstone …

Jun 9, 2025 · An alphabetical list of precious and semiprecious gemstones, complete with photographs and a look at their chemical composition.

Oct 17, 2025 · Everything about precious gemstones including diamonds, rubies, sapphires, and emeralds and origins, properties in this expert guide!