jewelry

Jade is one of the most popular and expensive gemstones. It can also receive many enhancements. Learn about jade treatments and how to identify…

The crossed filters technique allows gemologists to detect chromium in gems. Learn how to build a portable device for conducting this useful ID…

Master peridot buying with our expert guide covering quality evaluation, pricing secrets, jewelry considerations, and top global sources for…

Gem identification is part detective work, part art. Learn how gemologists can distinguish gem species and determine whether a stone is natural…

Learn how lab grown sapphires are made and how gemologists can distinguish natural from synthetic sapphires.

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.

What is Arizona black jade? Learn about this unusual opaque black gem material and follow this pendant carving demonstration by a master carver.…