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Chalcedony
Chalcedony

Brucite
Brucite



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Chalcedony
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Brucite

Chalcedony and Brucite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous, Pearly

Pleochroism

-
-

Dispersion

0.010.03
0.005 1
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Transparency

Translucent, Translucent to opaque
TransparentMichael O’Donoghue

Refractive Index

1.530-1.5431.56-1.60
1 3.25
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Optic Character

-
-

Crystal System

Trigonal
Trigonal

Birefringence

0.003-0.0090.010-0.020
0 0.296
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Clarity

Translucent
TransparentMichael O’Donoghue

Chalcedony and Brucite Optic Character

Chalcedony and Brucite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Chalcedony and Brucite Physical Properties like crystallographic symmetry, pleochroism,etc. in the crystal. Some of the optical properties are refractive index, luster, optic character, pleochroism etc. Prominent among these is Chalcedony and Brucite optic character. You might have noticed your gemologist rotating the gemstone while testing it. Rotating a gemstone along its optic axis helps in determining its optic character.

Chalcedony and Brucite Transparency

Similar to their colors, Chalcedony and Brucite transparency can also be used as criteria for their primary identification. Although transparency cannot be the only criteria for gemstone identification, it can efficiently used in gemstone grading. Talking about their transparency, Chalcedony is Translucent and Translucent to opaque while Chalcedony is Translucent and Translucent to opaque in appearance.