Hercynite and Rosasite Optical Properties

Hercynite

Rosasite

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1 Optical Properties

1.1 Luster

Vitreous

Silky, Vitreous

1.2 Pleochroism

Not Available

Strong: X = pale emerald green or colourless; Y = dark emerald green or pale blue; Z = dark emerald green or pale blue

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Translucent

Not Available

1.5 Refractive Index

1.80-1.831.672-1.688

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Isometric Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m

monoclinic

1.8 Birefringence

Not Available0.139-0.143

0 0.296

1.9 Clarity

Translucent

Not Available

Hercynite and Rosasite Optic Character

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

Similar to their colors, Hercynite and Rosasite 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, Hercynite is Translucent while Hercynite is Translucent in appearance.