Rose Quartz

There are so many common gemstone treatments available today that keeping track of them can be difficult. This list and handy cheat sheet can help.…

Although gemstone magnetism isn’t commonly tested, it can help gemologists distinguish similar looking gems. Learn how to analyze this property.…

Made from two or more materials, assembled gems can make durable and affordable jewelry. Learn more about gemstone doublets, triplets, and other…

An assembled gemstone is constructed from two or more combined materials. Gemstone doublets and triplets, intarsias, and rhinestones are all…

Even though diamonds make elegant and durable gems, you may find two stones that look alike. In contrast, no two opals look alike. Their beauty is…

This table contains a selection of minerals gemologists may encounter as jewelry stones or gem specimens. The gems are sorted by their crystal…

Measuring specific gravity helps gemologists identify gemstones. The following table lists the specific gravity values for a variety of gem…

Refractive indices and double refraction (birefringence) help gemologists identify gems. The following table lists these values for selected…

What is the color of sugilite? Grape jelly purple is a good description. More popular among consumers in Asia than North America, this is a very rare…