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Brucite
Brucite
☒

Umbalite
Umbalite
☒



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Brucite
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Umbalite
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous, Pearly
-
0.03
TransparentMichael O’Donoghue
1.56-1.60
-
Trigonal
0.010-0.020
TransparentMichael O’Donoghue
 
-
-
0.02
TransparentGemdat.org
1.730-1.820
-
-
-9999
TransparentGemdat.org

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