Mineral Guide > Precious Stones > Lapis Lazuli gem stone

Lapis Lazuli gem stone

Lapis Lazuli gem stoneThe stone known as Lapis Lazuli as it occurs in nature is not a single mineral, but a mixture of several, among which are calcite, pyrite, and pyroxene. From these, however, it is possible to separate a mineral of uniform composition sometimes crystallized in dodecahedrons which is probably the essential ingredient of the stone. This mineral is known as Lazulite and in composition is a silicate of soda and alumina with a small quantity of sodium sulphide.

Lapis Lazuli picture