Rhodochrosite and Hibonite Optical Properties

Rhodochrosite

Hibonite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Weak

O = brownish gray; E = gray

1.3 Dispersion

0.02NA

0.007 1

1.4 Transparency

Transparent, Opaque, Transparent to nearly opaque

Handbook of mineralogy (2001)

1.5 Refractive Index

1.601.79-1.807

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

Hexagonal

1.8 Birefringence

0.208-0.220Not Available

0 0.296

1.9 Clarity

Transparent to nearly opaque

Handbook of mineralogy (2001)

Rhodochrosite and Hibonite Optic Character

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

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Rhodochrosite and Hibonite Transparency

Similar to their colors, Rhodochrosite 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, Rhodochrosite is Opaque, Transparent and Transparent to nearly opaque while Rhodochrosite is Opaque, Transparent and Transparent to nearly opaque in appearance.