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Sphalerite
Sphalerite
☒

Blue John
Blue John
☒



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Sphalerite
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Blue John
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Optical Properties

Luster

Adamantine
-

Pleochroism

-
-

Dispersion

0.160.02
0.005 1
👆🏻

Transparency

Transparent, Translucent
Transparent

Refractive Index

2.368-2.3711.432-1.436
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Isometric
-

Birefringence

-9999-9999
0 0.296
👆🏻

Clarity

Transparent
Transparent

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