Calcite Vs. Graphite

Calcite is a very popular mineral composed of calcium carbonate.^[1] Graphite is also a very popular mineral and its chemical composition is carbon.^[2]

Quick Facts on Differences of Calcite and Graphite

For a quick recap of the differences calcite and graphite:

• While both calcite and graphite can be opaque, calcite can be translucent or transparent.
• While both calcite and graphite can be hexagonal, in terms of crystallography, calcite can be trigonal.
• For chemical formulas, calcite is CaCO3 while graphite is C.
• In terms of luster, calcite can be pearly or vitreous while graphite is metallic.
• Calcite streaks white while graphite streaks black.
• Calcite can be commonly red while graphite can be commonly black.
• Calcite's hardness is higher than graphite - calcite is 3 and graphite ranges from 1 to 2 on the Moh's scale.

Quick Facts on Similarities of Calcite and Graphite

The similarities of calcite and graphite include:

• Calcite's rarity is similar to graphite.

Summary of Calcite

Calcite is a mineral that is widely distributed throughout the world. It is a carbonate mineral that is composed of calcium carbonate, which gives it a white or colorless appearance. Calcite is often found in sedimentary rocks, such as limestone and marble, as well as in hydrothermal veins and in some metamorphic rocks. It is also found in the shells of marine organisms, such as clams and oysters.

Summary of Graphite

Graphite is a naturally occurring mineral that is composed of carbon atoms arranged in a hexagonal lattice structure. It is a soft and black substance that is commonly used in pencils. Graphite is easily identifiable by its dark color and the way it leaves a mark on paper when used in a pencil. When rubbed against a rough surface, it leaves a gray streak. The mineral is also known for its metallic luster and its ability to conduct electricity.

Table Comparison of Calcite vs Graphite