Gemstones Encyclopedia

Glass has been used in

Soft and brittle, rare augelites

When faceted, the members of

Collectors prize deep blue azurite

Massive white barite (also called

Bayldonite is a nondescript greenish

With dispersion higher than diamond

The beryls are among the

Difficult to facet and typically

Extremely rare as a cut

Black is a color that

Also known as heliotrope, bloodstone