Figure 1. Sapphires from Madagascar: a beautiful 3.29 ct untreated faceted stone and an assortment of rough in the background. Madagascar has produced many high-quality stones in the last few years ...

Filigree inlay art originated in the Warring States Period (475-221 BC). At the time, it was called “Jin Yin Cuo,” which involved painting gold and silver on the surface of bronze artworks. With the ...

Todd’s Gems Todd Wacks outlines how garnets believed to be “regular” Tanzanian rhodolite when discovered in the late 1980s turned out to be rare color-change pyropes instead. In this video, he ...

Jadeite jade is one of the most important aggregate gems in today’s global marketplace, with known sources in Myanmar, Japan, Russia, and Guatemala. Among them, Myanmar is the most legendary and still ...

This chart focuses primarily on the types of natural inclusions found in tourmaline, as well as the minerals in which tourmaline can be found as an inclusion. Treatments such as enhancement of ...

Blue zircon is perhaps best known from Cambodia, with most if not all of the material recovered as brown stones that turn blue upon heating. Recently, Brent Smith of Phoenix Gems supplied us with a ...

Diamonds, colored stones, and pearls submitted to GIA laboratories today will have services completed and be ready for return by the estimated dates noted below. Requesting additional services after ...

As a well-respected institution, the GIA Hong Kong School attracts international students from around the globe. Our passionate instructors are all leaders in their fields and dedicated to delivering ...

Quality Assurance Benchmarks provide an objective method for ensuring the production and presentation of quality jewelry. Learn how to compare jewelry against acknowledged criteria, how to achieve ...

The Jewelry Design & Technology diploma program covers topics essential to becoming a jewelry designer and CAD (computer-aided design) technician, including designing a piece of jewelry from a concept ...

Now featuring one log in for My Laboratory and the GIA Client Portal. Maintain your laboratory account information and grading results online. You can manage your team members and provide access to My ...

Intriguing Sapphire from Montana, a New Source of Emerald in Central China, and Arkansas Turquoise Duncan Pay, Editor-in-Chief Reports on a new source of primary gem-quality sapphire from Montana, ...