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Chalcedony
Chalcedony

Omphacite
Omphacite



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Chalcedony
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Omphacite

Chalcedony and Omphacite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous
1.2 Pleochroism
AbsentWalter Schumann
Weak: colorless -- very pale green -- very pale green
1.3 Dispersion
NoneNA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent, Translucent to opaque
TranslucentAnthony et al, Handbook of mineralogy (2001)
1.5 Refractive Index
1.530-1.5431.662-1.723
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
Not Available
1.8 Birefringence
0.003-0.009Not Available
Achroite
0 0.296
1.9 Clarity
Translucent
TranslucentAnthony et al

Chalcedony and Omphacite Optic Character

Chalcedony and Omphacite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Chalcedony and Omphacite 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 Omphacite 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 Omphacite Transparency

Similar to their colors, Chalcedony and Omphacite 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.