General Information:
Chemical Formula:
C
Composition:
(Molecular Weight = 12.01 gm)
Carbon 100.0 % C
Empirical Formula:
C
Environment:
Gas rich, ultra-basic diatremes from mantle depths (>30 km)and alluvial placer deposits derived from the Kimberlite rocks. Kimberlite = olivine, garnet, pyroxene, and calcite.
Locality:
Kimberly, republic of South Africa. India. Brazil. Ural Mountains, Russia. Murfreesboro, Arkansas, USA.
Name Origin:
From the Greek, adamas, meaning "invincible" or "hardest."
Physical Properties:
Cleavage:
[111] Perfect, [111] Perfect, [111] Perfect
Color:
colorless, white, gray, black, or blue.
Density:
3.5 - 3.53, Average = 3.51
Diaphaniety:
Transparent to Subtransparent to translucent
Habits:
Euhedral Crystals - Occurs as well-formed crystals showing good external form., Granular - Generally occurs as anhedral to subhedral crystals in matrix.,
Hardness:
10 - Diamond
Luminescence:
Fluorescent.
Luster:
Adamantine
Streak:
colorless
More details...