The only reported cut catapleiite is from Mte. Ste. Hilaire, Quebec, Canada, in the form of tiny colorless gems.

Cassiterite is a durable gemstone with tremendous dispersive fire, especially visible in properly cut pale-colored stones. As the principal ore

The best-known and generally least expensive variety of chalcedony is carnelian. It ranges in color from yellow-orange to rich, near

Cancrinite is one of the most attractive of all opaque or translucent gem materials. It is a bit too soft

The material usually seen on the market as “canasite” is purplish in color. It is frequently confused with another purplish

Calcite is common and abundant throughout the world. The material has little intrinsic value since it is not scarce. However,

Several species of marine mollusks produce stony growths called calcareous concretions or non-nacreous pearls. Varieties such as conch pearls, tridacna

Although bytownite occurs throughout the world, this feldspar variety is rarely encountered in gem-quality condition.

Pale pink and brownish red bustamite can make a very attractive faceted gem. However, stones in large sizes are rare

Brucites are extremely difficult to cut. Although too soft for jewelry use, faceted pieces would be great additions to collections