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.

We will now describe some of the colored gemstones that provide important information on the mineralogy, composition, and evolution of the earth.

This course provides basic, essential knowledge of colored stones, with an in-depth focus on the “Big Three” of the gemstone world: ruby, sapphire, and emerald. Subjects covered include the language of colored stones; color’s powerful role in gemstone value and the unique characteristics of popular colored stones; and how color, clarity ...

May 4, 2018 · Colorful gemstone engagement rings are decorating the fingers of royals and other style makers, reviving a not-so-new trend for adding pops of color – and personality – to traditional colorless diamond engagement rings.

Birthstones are a fun, popular and colorful introduction to the world of gemstones. They appeal to audiences around the world regardless of gender, age, nationality or religion. Birthstones carry secrets, attributes and lore that are unique to each gemstone.

Tourmalines have a variety of exciting colors with one of the widest color ranges of any gem species, occurring in various shades of virtually every hue.

Diamond is the birthstone for April and the gem of the 10th and 60th anniversaries. Fancy color diamond adds a unique twist to your celebration.

Amethyst Gemstone is the purple variety of the Quartz mineral. Amethyst’s purple color can range from a light lilac to a deep, intense royal purple, and from brownish to vivid. Gem Encyclopedia

Glowing Gems: Fluorescence and Phosphorescence of Diamonds, Colored Stones, and Pearls. Photoluminescence imaging, which analyzes how gemstones glow under ultraviolet light, is an important analytical tool for detecting impurities, natural versus synthetic gems, and treatments through the observation of fluorescence and phosphorescence patterns.

Warm Up to Cocoa-Colored Gems Chocolate has found its way to the necks, arms, hands, and bodices of fashion runway models. According to experts at GIA (Gemological Institute of America), gemstones with warm, brown tones are heating up.