jade

Question: Is nephrite jade from Xinjiang, China banned in the United States? By International Gem Society 2 minute read Hotan, Xinjiang, China…

Gem carvings vary widely in size, shape, and quality. You can find small, simple carvings with a glued-on bail for just a couple of dollars. Fine…

Our gemstone care guide covers many popular gems. Learn how best to maintain your gemstone jewelry and what kinds of stresses and cleaning methods…

Chrysoprase is apple-green chalcedony that derives its color from nickel. Its hardness and striking color make it a popular gemstone for jewelry…

Gem dealers are often their clients’ most trusted advisers on gem matters. Learn how to help your clients with inherited gemstones and jewelry.…

Gem carvings are judged on material, workmanship, and artistry. Learn how to apply these criteria to a piece with our step-by-step guide.

A set of color filters can be helpful in the field and in the lab. Learn the limitations and uses of color filters for gemology.

Some gems contain both natural and lab-made components. Learn about these hybrid gemstones and how to distinguish them from mined gems.

Gemologists use the hot point test to determine if a piece is a plastic imitation or coated in wax. Learn more about this destructive test here.