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Powellite
Powellite

Hibonite
Hibonite



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Powellite and Hibonite Optical Properties

1 Optical Properties
1.1 Luster
Greasy, Subadamantine
Vitreous
1.2 Pleochroism
In deeply colored specimens: blue greenAnthony et al
O = brownish gray; E = gray
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Handbook of mineralogy (2001)
1.5 Refractive Index
1.974-1.9841.79-1.807
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
Hexagonal
1.8 Birefringence
Not AvailableNot Available
Achroite
0 0.296
1.9 Clarity
Transparent
Handbook of mineralogy (2001)

Powellite and Hibonite Optic Character

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

Powellite and Hibonite Transparency

Similar to their colors, Powellite and Hibonite 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, Powellite is Transparent while Powellite is Transparent in appearance.