Search a city or postal code to find retailers who carry GIA-graded diamonds or have GIA-trained staff. Results will include addresses, store hours and directions. Store hours reflected on Retailer ...

Akoya pearls are the small white pearls that most people picture when they think of pearls. They are saltwater pearls, and are usually round and white or cream, with a pink overtone and high luster.

Those born in January are lucky to have the beautiful and diverse garnet as their birthstone. Garnets are commonly red but also come in an extraordinary range of beautiful colors, including orange, ...

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 ...

Students explore more than 60 species of common and collector gemstones found in the marketplace. Subjects covered include the GIA Colored Stone Grading System, gemstone formation, composition, ...

Diamond color is all about what you can’t see. Diamonds are valued by how closely they approach colorlessness – the less color, the higher their value. (The exception to this is fancy color diamonds, ...

Although lost for literally hundreds of years after the Spanish conquest of the Aztecs, many deposits of jadeite have been found in Guatemala during the last two decades. Following the discovery of ...

Jewelry-quality synthetic malachite is now being manufactured in the USSR. The texture, structure, and physical and physico-chemical properties of this synthetic malachite are reported. Three textural ...

Figure 1. In this high-quality translucent amazonite bracelet, the average bead diameter is 12 mm. Photo by Kevin Schumacher. A type of high-quality translucent blue amazonite feldspar (figure 1) has ...

Attend an informative briefing at the booth on diamonds and connect with staff and fellow industry leaders at L99. Drop off your colored stones at the GIA Show Service Laboratory in Palm G, Level 3, ...

The delicate interlinked cross-like cloud pattern found in this 0.62 ct diamond has never been encountered in GIA’s laboratories. Photomicrograph by Nathan Renfro; field of view 2.40 mm. GIA’s ...

Diamond inclusions can be analyzed using Raman spectroscopy, ideally when they are close to or breaking the surface. The New York lab recently had the opportunity to study a rare inclusion of xenotime ...