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Hibonite
Hibonite

Andradite Garnet
Andradite Garnet



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Hibonite
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Andradite Garnet

Hibonite and Andradite Garnet Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Adamantine
1.2 Pleochroism
O = brownish gray; E = gray
Not Available
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Handbook of mineralogy (2001)
Transparent, Opaque, Transparent to opaque
1.5 Refractive Index
1.79-1.8071.888-1.889
Agate Opal
1 3.25
2.5 Optic Character
Not Available
Not Available
2.6 Crystal System
Hexagonal
Isometric
2.7 Birefringence
Not AvailableNot Available
Achroite
0 0.296
2.11 Clarity
Handbook of mineralogy (2001)
Transparent to opaque

Hibonite and Andradite Garnet Optic Character

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

Hibonite and Andradite Garnet Transparency

Similar to their colors, Hibonite and Andradite Garnet 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, Hibonite is Handbook of mineralogy (2001) while Hibonite is Handbook of mineralogy (2001) in appearance.