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Herderite
Herderite
☒

Blue spinel
Blue spinel
☒



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Herderite
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Blue spinel
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous
-
0.01
Transparent
1.587-1.642
Biaxial/+
monoclinic
0.028-0.032
Transparent
 
-
-
-
-
-9999
-
-
-9999
-

Compare Colorless Gems

Colorless Gems

Phenakite
Phenakite
Phosphophyllite
Phosphophyllite
Zektzerite
Zektzerite
Blue spinel
Hyalite
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Muscovite
Blue spinel Vs Muscovite
Blue spinel
Oligoclase
Blue spinel Vs Oligoclase

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