Sapphire

Watermelon tourmaline adds a fun and playful feel to jewelry. Check out our watermelon tourmaline buying guide and learn the quality criteria…

The Usambara effect is the term applied to a type of color change in gemstones, first seen in tourmalines from the Umba Valley in Tanzania. However,…

Tourmaline is a large crystalline silicate mineral supergroup that consists of many gem species that come in a rainbow of colors. Tourmaline is…

With so many recommended faceting angles, new gem cutters can have a hard time choosing one. Learn the basic guidelines and some exceptions to the…

Buying a diamond doesn’t have to be difficult. Learn everything you need to know to buy the best diamond for your engagement ring.

Lapis lazuli has been used since ancient times and remains popular today. This gemstone has been prized for its bright, blue color and used for inlay…

Distinguishing between natural and synthetic gems is a critical skill for gemologists. Learn about gem making processes and the telltale signs…

Selecting and orienting rough gems can be challenging for new faceters. These tips can help you choose the right tools and resolve some common problems.…

Brian Gavin Diamonds (BGD) have a reputation backed by their founder and namesake, a renowned expert in the diamond-cutting field. They…