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Vivianite
Vivianite

Topazolite
Topazolite



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Vivianite
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Topazolite
Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous, Pearly
Anomalous plechroism is strong with colours deep blue/pale yellowish green/yellowish green.Michael O’Donoghue
0.03
Transparent
1.560-1.640
-
-
0.054-0.075
Transparent
 
Subadamantine
-
0.06
Transparent
1.855-1.895
-
-
-9999
Transparent