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 …

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.

Dec 26, 2025 · gemstone, any of various minerals highly prized for beauty, durability, and rarity. A few noncrystalline materials of organic origin (e.g., pearl, red coral, and amber) also are …

Articles about gemstones written by a GIA Graduate Gemologist. Each article includes photos and information about the gem's physical properties and geologic origin.

Jan 3, 2025 · Gem species are mineral species prized for their durability and beauty. Learn how chemical formulas and crystal structures define species and what causes gem variations, such …

If you describe something or someone as a gem, you mean that they are especially pleasing, good, or helpful.

Our wide collection of gemstones jewelry, diamond rings, wedding rings, pendants, earrings, and more has been carefully curated for stunning quality.

Gemstones are nature's precious creations, admired for their vibrant colours and spiritual benefits.Discover natural gemstones for astrological benefits at GemPundit.

Gemstone List: A Complete Gemstones List with Images. Our gemstone list features over 200 precious and semi-precious varieties, a comprehensive index to find the ideal colored stone. …

Jan 2, 2025 · Choose a field book that is written about the area where you found the mineral, gem, or rock. Geological features vary from place to place, so a guide from the area can be …