cubic Simulant diamond simulant
YAG (Yttrium Aluminium Garnet) (Faceted)
Y3Al5O12
Crystal Structure
#! Species: YAG (Yttrium Aluminium Garnet)
#! System: Cubic (m3m)
#! Habit: Garnet-type dodecahedron with trapezohedron
cubic[m3m]:{110}@1.0 + {211}@0.8
cubic
m3m
{110} {211}
Quick Facts
Hardness
8.0
Specific Gravity
4.55
Refractive Index
1.833
Optical Character
Isotropic
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Open in PlaygroundPhysical Properties
Crystal Systemcubic
Hardness (Mohs)8.0
Specific Gravity4.55
CleavageNone
FractureConchoidal
LustreVitreous to sub-adamantine
Optical Properties
Refractive Index1.833
Optical CharacterIsotropic
Dispersion0.028
FluorescenceVariable
Origin & Identification
OriginSimulant
Growth MethodCzochralski
First Produced1960
Diagnostic FeaturesLower RI than diamond (1.833 vs 2.417), lower dispersion (0.028 vs 0.044), lower hardness (8 vs 10), singly refractive, thermal probe reads non-diamond
Colours
ColourlessGreenYellowBlue (by doping)
Common Inclusions
Gas bubblesUndissolved particles
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Open in PlaygroundNatural Counterpart
The natural gem this simulant imitates
Related Minerals
Other minerals in the cubic system
