trigonal Simulant coral simulant
Synthetic Coral (Cabochon)
CaCO3 (calcite-based imitation)
Crystal Structure
trigonal
-3m
Quick Facts
Hardness
3.0
Specific Gravity
2.4
Refractive Index
1.48
Optical Character
Aggregate
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Open in PlaygroundPhysical Properties
Crystal Systemtrigonal
Hardness (Mohs)3.0
Specific Gravity2.4
LustreDull to waxy
Optical Properties
Refractive Index1.48
Optical CharacterAggregate
FluorescenceVariable
Origin & Identification
OriginSimulant
Diagnostic FeaturesLacks natural organic growth patterns and wood-grain structure, uniform colour without natural colour variation, effervesces with HCl, lower SG than natural precious coral, may show moulding marks
Colours
RedPinkOrangeWhite
Common Inclusions
Uniform structureAbsence of growth patternsMould marks
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Open in PlaygroundNatural Counterpart
The natural gem this simulant imitates
Related Minerals
Other minerals in the trigonal system
