Yellow Calcite 10mm Round A Grade - 15-16 InchCalcite is a rock forming mineral that is extremely common and found throughout the world in sedimentary, metamorphic, and igneous rocks. Calcite is the principal constituent of limestone and marble. These rocks are extremely common and make up a significant portion of Earth's crust.

Many stones in the Russian crown jewels from the 17th century which were thought to be rubies are actually red Tourmaline

It is best known for its characteristic deep blue to violet-blue color

Like other Agates

and Rutile as well

Hematite within the stone is responsible for its reddish and rusty colors

double leaf spring construction

second only to Quartz

that is not formed in the Earth’s crust

Botswana Agate displays highly defined parallel banding

Jade refers to an ornamental mineral

many people believe that diamonds are formed from coal

It is made up of Calcite or Calcium Carbonate