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Omphacite
Omphacite

Coral
Coral



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Omphacite
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Coral

Omphacite and Coral Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous
Not Available
1.2 Pleochroism
Weak: colorless -- very pale green -- very pale green
AbsentWalter Schumann
1.3 Dispersion
NANone
Fluorite Optical Properties
0.007 1
1.4 Transparency
TranslucentAnthony et al, Handbook of mineralogy (2001)
Translucent
1.5 Refractive Index
1.662-1.7231.486-1.658
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
Trigonal
1.8 Birefringence
Not Available0.160-0.172
Achroite
0 0.296
1.9 Clarity
TranslucentAnthony et al
Translucent

Omphacite and Coral Optic Character

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

Omphacite and Coral Transparency

Similar to their colors, Omphacite and Coral 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, Omphacite is Handbook of mineralogy (2001) and TranslucentAnthony et al while Omphacite is Handbook of mineralogy (2001) and TranslucentAnthony et al in appearance.