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.

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 information, a buyer’s guide, photos, videos & research.

A gemstone (also called a fine gem, jewel, precious stone, semiprecious stone, or simply gem) is a piece of mineral crystal which, when cut or polished, is used to make jewelry or other adornments.

2020年6月9日 · 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 and what sets them apart.

2019年11月26日 · The only "precious" gemstones are diamond, ruby, sapphire, and emerald. All other quality stones are called "semiprecious," even though they may not be any less valuable or beautiful. Today, mineralogists and gemologists describe stones in technical terms, including their chemical composition, Mohs hardness , and crystal structure.

A complete list of precious and semi-precious gemstones: Showing over 200 gemstone varieties, our gemstone index will help you find the perfect colored stone for your jewelry, collecting and crystal healing needs.

2024年5月6日 · Precious stones, also known as precious gemstones and precious gems, are naturally occurring minerals that possess notable beauty, rarity, and durability. Traditionally, only four gemstones in the world are considered precious: diamonds, sapphires, rubies, and emeralds.

2024年8月31日 · There are only four gemstones universally considered to be in the modern day’s list of precious stones. These four come from only three mineral groups, namely, corundum, beryl and diamond. Does it make you wonder how 4 precious stones consist of only 3 minerals? Let’s tackle each member of the contemporary precious stones list.

2024年11月14日 · There’s something almost magical about gemstones. Whether it’s the mesmerizing depth of sapphire, the fiery play of colors in an opal, or the regal green of an emerald, precious stones have a way of catching the eye and refusing to let go.

2020年11月12日 · What Are Precious Gemstones? Only four stones are considered “precious”: sapphires, diamonds, rubies, and emeralds. These four precious stones have historically been the priciest and most valuable kinds of gemstones. All the others are regarded as semi-precious.