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Fibrolite
Fibrolite

Prasiolite
Prasiolite



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Fibrolite
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Prasiolite

Fibrolite and Prasiolite Optical Properties

Optical Properties

Luster

-
Vitreous

Pleochroism

DistinctArthur Thomas
Very weak: light green pale greenWalter Schumann

Dispersion

0.020.01
0.005 1
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Transparency

Transparent
Transparent, Translucent

Refractive Index

1.658-1.6781.544-1.553
1 3.25
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Optic Character

-
-

Crystal System

-
Trigonal

Birefringence

-99990.009
0 0.296
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Clarity

Transparent
Transparent

Fibrolite and Prasiolite Optic Character

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

Fibrolite and Prasiolite Transparency

Similar to their colors, Fibrolite and Prasiolite 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, Fibrolite is Transparent while Fibrolite is Transparent in appearance.