Anhydrite and Esperite Optical Properties

Anhydrite

Esperite

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1 Optical Properties

1.1 Luster

Pearly, Greasy

Vitreous

1.2 Pleochroism

For violet varieties

colorless.

1.3 Dispersion

0.01NA

0.007 1

1.4 Transparency

Transparent

OpaqueAnthony et al, Opaque, Transparent

1.5 Refractive Index

1.570-1.6141.760-1.774

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

monoclinic

1.8 Birefringence

0.042-0.0440.012

0 0.296

1.9 Clarity

Transparent

OpaqueAnthony et al

Anhydrite and Esperite Optic Character

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

Similar to their colors, Anhydrite and Esperite 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.