cubic Native Elements
Diamond (Octahedron)
C
Quick Facts
Hardness
10.0
Specific Gravity
3.52
Refractive Index
2.417
Optical Character
Isotropic
Crystal Structure
#! Species: Diamond
#! System: Cubic (m3m)
#! Habit: Octahedral with dodecahedron truncation
cubic[m3m]:{111}@1.0[trigon:dense] + {110}@0.2
cubic
m3m
{111} {110}
Physical Properties
Crystal Systemcubic
Hardness (Mohs)10.0
Specific Gravity3.52
CleavagePerfect {111}
FractureConchoidal
LustreAdamantine
Optical Properties
Refractive Index2.417
Optical CharacterIsotropic
Dispersion0.044
FluorescenceVariable; blue LWUV common in Type Ia, inert in Type IIa
Colours
ColorlessYellowBrownBluePink
Localities
South AfricaRussiaAustraliaBotswana
Common Inclusions
FeathersCrystalsCloudsPinpointsNeedles
Known Treatments
HPHTIrradiationCoatingFracture filling
Crystal Forms
octahedrondodecahedron
Diagnostic Features
Adamantine lustre; extreme hardness (10); high dispersion (0.044); strong thermal conductivity
Interactive Preview
Open this crystal in the CDL Playground to rotate, export, and explore in 3D.
Open in Playground #! Species: Diamond
#! System: Cubic (m3m)
#! Habit: Octahedral with dodecahedron truncation
cubic[m3m]:{111}@1.0[trigon:dense] + {110}@0.2
Synthetics & Simulants
Known synthetic and simulant versions of Diamond (Octahedron)
Cubic Zirconia (Faceted (Brilliant Cut)) simulant
skull melting
GGG (Gadolinium Gallium Garnet) (Faceted) simulant
czochralski
LuAG (Lutetium Aluminium Garnet) (Faceted) simulant
czochralski
Moissanite (Faceted) simulant
Strontium Titanate (Faceted) simulant
flame fusion
Synthetic Rutile (Faceted) simulant
flame fusion
YAG (Yttrium Aluminium Garnet) (Faceted) simulant
czochralski
CVD Diamond (CVD Plate) synthetic
cvd
HPHT Diamond (Cuboctahedron) synthetic
hpht
Related Minerals
Other minerals in the cubic system
