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Alunite
Alunite
☒

Spinel
Spinel
☒



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Alunite
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Spinel
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous, Pearly
-
0.02
-
1.572
-
Trigonal
0.020
-
 
Vitreous
Absent
0.02
Transparent, Translucent, Transparent to translucent
1.73
-
Isometric
-9999
TransparentUlrich Henn and Claudio C. Milisenda

Compare Red Gemstones

Red Gemstones

Polyhalite
Polyhalite
Vanadinite
Vanadinite
Jacinth
Jacinth
Spinel
Bornite
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Spinel
Carnallite
Spinel Vs Carnallite
Spinel
Piemontite
Spinel Vs Piemontite

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