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.

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.

Dec 26, 2025 · 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.

Discover everything about amethyst gemstones — from their meaning and ... Ametrine is a variety of quartz that displays bands of both amethyst p... Ammolite is a rare, iridescent, gem-quality material …

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

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 …

Gemstones.com is the one-stop destination for all gem information, providing quality educational material and inspiring to explore the world of gemstones.

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 …

Gemdat is a unique reference web site on gems and gemology with something for everyone from beginners to experts. Join our community and get involved! Select a colour to view gemstone photos. …