Anhydrite and Rosasite Optical Properties

Anhydrite

Rosasite

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1 Optical Properties

1.1 Luster

Pearly, Greasy

Silky, Vitreous

1.2 Pleochroism

For violet varieties

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

1.3 Dispersion

0.01NA

0.007 1

1.4 Transparency

Transparent

Not Available

1.5 Refractive Index

1.570-1.6141.672-1.688

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

monoclinic

1.8 Birefringence

0.042-0.0440.139-0.143

0 0.296

1.9 Clarity

Transparent

Not Available

Anhydrite and Rosasite Optic Character

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

Similar to their colors, Anhydrite 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, Anhydrite is Transparent while Anhydrite is Transparent in appearance.