Graphite
ID: 134
Graphite
Chemical Formula
C
Hardness (Mohs)
1 - 2
Crystal System
Hexagonal / Rhombohedral
Streak
Black
Luster
Metallic, earthy
Diaphaneity
Opaque (transparent only in extremely thin flakes)
Color
Iron-black to steel-gray; deep blue in transmitted light.
Crystal Habit / Mode of Occurrence
Tabular, six-sided foliated masses, granular to compacted masses.
Fun Facts
Graphite is one of the softest minerals and is an excellent conductor of electricity.