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.

Our birthstone chart features both modern and traditional options. See galleries of birthstone jewelry by month and learn more about these beautiful gems.

Browse our gemstone list with names, colors, and types of gems. Explore natural gems like ruby and sapphire at GemSelect for jewelry or collecting.

Gem Encyclopedia is a virtual journey through the science and lore of Gemstones from across the globe. Each Gem page features Gemological Information, a Buyer’s guide, photos, videos & research.

Gemstone, any of various minerals highly prized for beauty, durability, and rarity. A few noncrystalline materials of organic origin (such as pearl and amber) also are classified as gemstones.

Emerald is the most popular green gemstone in the United States and most of the world.

On this page, you’ll find detailed explanations of how both common and rare gemstones form, what minerals they are made of, where they occur, what optical and physical properties they have, and …

The gemopedia is the gemstone encyclopedia for any and all gemstones found across the globe. Find the facts, varieties, physical properties.

Oct 15, 2025 · Explore the main types of gemstones, their properties, classifications, origins, and uses in jewelry. Learn the difference between precious and semi-precious stones, how to identify …

Jul 17, 2025 · A gemstone is a naturally occurring mineral—or, in some cases, an organic material like amber or pearl—that is cut and polished for use in jewelry due to its beauty, rarity, and durability.