Graphite

The name graphite comes from the Greek word grapt or 'to write' because of its use in making pencil lead. Graphite is found in metamorphic schists and crystalline limestones and less commonly in hydrothermal veins. Large quantities of graphite are also produced in furnaces from coal.

Chemical Formula:

C

Mineral Class:

Element

Crystal System:

Hexagonal

Symmetry:

6/m 2/m 2/m

Hardness:

1-2

Specific Gravity:

2.23

Cleavage:

{0001} perfect

Fracture:

Sectile

Color:

Black

Streak:

Black

Luster:

Metallic, dull, earthy

Transparency:

Opaque

Common Habits:

Foliated, earthy

Other Properties:

Greasy feel

Notable Localities:

China; Russia; North Korea; South Korea; India; Mexico

Uses:

Manufacture of refractory crucibles, dry lubricant, pencil 'lead', manufacture of paint, batteries, electrodes and electrotyping

Associated Minerals:

Quartz, biotite, orthoclase, tourmaline, apatite, pyrite, titanite

Specimens:


Graphite
Yuenan, China