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Blue John
Blue John
☒

Chalcedony
Chalcedony
☒



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Blue John
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Chalcedony
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
-
-
0.02
Transparent
1.432-1.436
-
-
-9999
Transparent
 
Vitreous
-
0.01
Translucent, Translucent to opaque
1.530-1.543
-
Trigonal
0.003-0.009
Translucent

Compare Blue Gemstones

Blue Gemstones

Chrome Tourmaline
Chrome Tourmaline
Common Opal
Common Opal
Cordierite Iolite
Cordierite Iolite
Chalcedony
Boulder Opal
Chalcedony Vs Boulder Opal
Chalcedony
Brucite
Chalcedony Vs Brucite
Chalcedony
Caledonite
Chalcedony Vs Caledonite

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