cubic Synthetic synthetic diamond
HPHT Diamond (Cuboctahedron)
Formula C
Crystal Structure
#! Species: HPHT Diamond
#! System: Cubic (m3m)
#! Habit: Cuboctahedral growth morphology
cubic[m3m]:{111}@1.0 + {100}@1.0
cubic
m3m
{111} {100}
Quick Facts
Hardness
10.0
Specific Gravity
3.52
Refractive Index
2.417
Optical Character
Isotropic
Physical Properties
- Crystal System
- cubic
- Hardness (Mohs)
- 10.0
- Specific Gravity
- 3.52
- Cleavage
- Perfect octahedral {111}
- Fracture
- Conchoidal
- Lustre
- Adamantine
Optical Properties
- Refractive Index
- 2.417
- Birefringence
- 0
- Optical Character
- Isotropic
- Dispersion
- 0.044
- Fluorescence
- Often greenish-yellow (SW UV), cross-shaped pattern under DiamondView
Origin & Identification
- Origin
- Synthetic
- Growth Method
- HPHT
- Manufacturer
- Various (De Beers/Element Six, Gemesis, New Diamond Technology)
- First Produced
- 1954
- Diagnostic Features
- Cuboctahedral growth sectors, metallic flux inclusions (Fe, Ni, Co), magnetic attraction (some), colour zoning follows growth sectors, Type Ib nitrogen (single substitutional), cross-shaped fluorescence pattern
Characteristics
Colours
YellowColourlessBlueGreenOrange
Common Inclusions
Metallic flux inclusions (Fe/Ni/Co)Dark metallic spotsGraining
Natural Counterpart
The natural gem this synthetic imitates
Related Minerals
Other minerals in the cubic system
