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.

Sep 30, 2025 · Gem hunting in Missouri has a lot of potential, with gemstones scattered across its diverse landscapes. The state’s geology has left a remarkable variety of materials waiting to …

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

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 …

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 & …

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 …

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 …

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, …

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 …