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Opal
Opal
☒

Pyrope Spessartine
Pyrope Spessartine
☒



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Opal
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Pyrope Spessartine
Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous, Pearly
None
0.01
Transparent, Translucent, Transparent to translucent
1.37-1.52
-
Trigonal
-9999
Transparent
 
-
-
0.02
-
1.730-1.820
-
-
0.027
TransparentUlrich Henn and Claudio C. Milisenda