With beautiful green to blue-green colors and interesting patterns, variscite is a popular hobbyist material for cabochons.

Very few vanadinites have ever been cut. This is unfortunate, since their red, orange, and brown colors are rich and

Always a dark, rich green color, uvarovite is one of the rarest members of the garnet family. Usually only seen

The fibrous material cuts interesting catseye cabochon gems, but they are curios only since they are much too soft and

Discover turquoise gemstone value factors, history, colors, treatments, and care. Learn how to identify genuine stones, top mining sources, and

Gem collectors prize tugtupite, the “Reindeer Stone,” for its rich colors and intense reaction to ultraviolet light. Sporadically used in

An emerald-green variety of grossular garnet, tsavorite is one of the most popular and expensive varieties of garnet. Suitable for

Triphylite is one of the world’s rarest gems. The IGS had the extraordinary privilege of examining a discovery of facetable

It is possible to misidentify tremolite, mistaking it for other amphiboles. Hexagonite is the rarest of the gem varieties of

Discover tourmaline’s stunning colors, value, and properties. Learn why this October birthstone makes exceptional jewelry and how to identify genuine