General Information:
Chemical Formula:
C
Composition:
(Molecular Weight = 12.01 gm)
Carbon 100.0 % C
Empirical Formula:
C
Environment:
Metamorphosed limestones, organic-rich shales, and coal beds..
Locality:
Ticonderoga, New York. Madagascar and Ceylon.
Name Origin:
From the Greek, graphein, "to write."
Physical Properties:
Cleavage:
[0001] Perfect
Color:
iron black, dark gray, black, or steel gray.
Density:
2.09 - 2.23, Average = 2.16
Diaphaniety:
Opaque
Habits:
Foliated - Two dimensional platy forms., Tabular - Form dimensions are thin in one direction., Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Hardness:
1.5-2 - Talc-Gypsum
Luminescence:
None.
Luster:
Sub Metallic
Streak:
black
More details...