Identification
Color Yellow-orange to deep red, rarely yellow, green, colorless
Crystal habit Disseminated – occurs in small, distinct particles dispersed in matrix.
Crystal system Hexagonal dihexagonal pyramidal 6mm
Twinning On {0001}
Cleavage On {1010}, perfect; parting on {0001}
Fracture Conchoidal
Tenacity Brittle
Mohs scale hardness 4
Luster Subadamantine to resinous
Streak Yellowish orange
Diaphaneity Translucent, transparent in thin fragments
Specific gravity 5.64–5.68
Optical properties Uniaxial (+)
Refractive index nω = 2.013, nε = 2.029
Birefringence δ = 0.016
References [1][2]
Identification
Color Yellow-orange to deep red, rarely yellow, green, colorless
Crystal habit Disseminated – occurs in small, distinct particles dispersed in matrix.
Crystal system Hexagonal dihexagonal pyramidal 6mm
Twinning On {0001}
Cleavage On {1010}, perfect; parting on {0001}
Fracture Conchoidal
Tenacity Brittle
Mohs scale hardness 4
Luster Subadamantine to resinous
Streak Yellowish orange
Diaphaneity Translucent, transparent in thin fragments
Specific gravity 5.64–5.68
Optical properties Uniaxial (+)
Refractive index nω = 2.013, nε = 2.029
Birefringence δ = 0.016
References [1][2]
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Identification
Color Yellow-orange to deep red, rarely yellow, green, colorless
Crystal habit Disseminated – occurs in small, distinct particles dispersed in matrix.
Crystal system Hexagonal dihexagonal pyramidal 6mm
Twinning On {0001}
Cleavage On {1010}, perfect; parting on {0001}
Fracture Conchoidal
Tenacity Brittle
Mohs scale hardness 4
Luster Subadamantine to resinous
Streak Yellowish orange
Diaphaneity Translucent, transparent in thin fragments
Specific gravity 5.64–5.68
Optical properties Uniaxial ( )
Refractive index nω = 2.013, nε = 2.029
Birefringence δ = 0.016
References [1][2]
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