Extremely rare as a cut gem, even in very complete collections. Many of the minerals in the tantalite group have […]

Difficult to facet and typically colorless, beryllonite is a rare collector’s gem. Some specimens can show a striking cat’s eye.

The beryls are among the most popular, and also the most expensive, of all gems. A wide range of color

With dispersion higher than diamond and sapphire-blue body color, benitoite is one of the most attractive of all rare gems.

Bayldonite is a nondescript greenish material that has been cut into cabochons by enterprising collectors of the unusual. Cut bayldonites

Massive white barite (also called known as baryte) looks like marble and could be used for decorative purposes. In spite

Collectors prize deep blue azurite crystals, but faceted gems are extremely rare. However, azurite frequently occurs mixed with green malachite,

When faceted, the members of the axinite mineral group are usually intensely pleochroic, with rich brown and purple colors dominating.

Soft and brittle, rare augelites are difficult to cut and unsuitable for wear. Faceted transparent pieces are only found in

Glass has been used in jewelry for thousands of years. By itself, glass is brittle and unimpressive with very little