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Benitoite
Benitoite

Fire Agate
Fire Agate



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Benitoite
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Fire Agate

Benitoite and Fire Agate Optical Properties

Optical Properties

Luster

Vitreous
Waxy, Vitreous, Greasy, Silky

Pleochroism

O = colorless; E = purple
-

Dispersion

0.040.01
0.005 1
👆🏻

Transparency

Transparent
Translucent

Refractive Index

1.757-1.8041.530-1.543
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Hexagonal
Trigonal

Birefringence

0.0470.003-0.009
0 0.296
👆🏻

Clarity

Transparent
Translucent

Benitoite and Fire Agate Optic Character

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

Benitoite and Fire Agate Transparency

Similar to their colors, Benitoite and Fire Agate 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, Benitoite is Transparent while Benitoite is Transparent in appearance.