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Coral
Coral
☒

Aragonite
Aragonite
☒



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Coral
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Aragonite
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
-
-
0.03
Translucent
1.486-1.658
-
Trigonal
0.160-0.172
Translucent
 
Vitreous, Resinous
StrongArthur Thomas
0.17
Transparent, Translucent
1.525-1.686
-
Orthorhombic
0.155
Transparent

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Organic » More

Organic » More

Bloodstone Heliotrope
Bloodstone Heliotrope
Black Opal
Black Opal
Binghamite
Binghamite

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Aragonite
Pearl
Aragonite Vs Pearl
Aragonite
Abalone
Aragonite Vs Abalone
Aragonite
Precious coral
Aragonite Vs Precious coral

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