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Benitoite
Benitoite

Amethyst
Amethyst



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Benitoite
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Amethyst

Benitoite and Amethyst Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous
1.2 Pleochroism
O = colorless; E = purple
None
1.3 Dispersion
0.040.01
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Transparent, Transparent to translucent
1.5 Refractive Index
1.757-1.8041.544-1.553
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Hexagonal
Trigonal
1.8 Birefringence
0.0470.009
Achroite
0 0.296
1.9 Clarity
Transparent
Transparent

Benitoite and Amethyst Optic Character

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

Similar to their colors, Benitoite and Amethyst 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.