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Mottramite
Mottramite
☒

Idocrase
Idocrase
☒



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Mottramite
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Idocrase
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Greasy
Visible X=Y= canary yellow to greenish yellow
0.04
-
2.170
-
Orthorhombic
0.150
-
 
-
-
0.02
-
1.67-1.76
-
tetragonal
-9999
-

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Brown Gemstones

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Petrified Wood
Idocrase
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Idocrase Vs Jet lignite

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