Profiles the extraordinary life and work of Ben Kho, from a young entrepreneur in Cambodia to an award-winning gem cutter.

GIA offers many opportunities for students to receive a scholarship. Scholarship offerings are made available to assist eligible students in reducing their financial burden and focusing on completing ...

View the holiday schedule for all GIA locations worldwide.

Programs & Courses GIA’s diverse course offerings will help prepare you with the knowledge and skills needed by industry employers today.

Find a store Retailer Lookup 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 ...

The world’s love of diamonds had its start in India, where diamonds were gathered from the country’s rivers and streams. Some historians estimate that India was trading in diamonds as early as the ...

Ruby crystals from Southeast Asia with a fixed six-rayed star, similar in effect to trapiche emeralds from Colombia, are described. They consist of six transparent-to-translucent ruby sectors ...

Diamond is the only gem made of a single element: It is typically about 99.95 percent carbon. The other 0.05 percent can include one or more trace elements, which are atoms that aren’t part of the ...

Sapphire is one of the big three of colored gemstones (the other two are ruby and emerald). This durable gemstone captures jewelry buyers with its practicality and aura of romance. Click here and ...

Amber is sometimes called “gold of the North.” Its warm luster is featured in beads, carvings, pendants, and cabochons, as well as decorative items like cups, bowls, snuff boxes, and umbrella handles.

Tourmalines come in a wide variety of exciting colors. In fact, tourmaline has one of the widest color ranges of any gem species, occurring in various shades of virtually every hue.

This selection of photomicrographs reveals some of the typical and less common inclusions and other growth features seen in natural sapphires.