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Phosphosiderite
Phosphosiderite

Anhydrite
Anhydrite



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Phosphosiderite
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Anhydrite

Phosphosiderite and Anhydrite Optical Properties

Optical Properties

Luster

Vitreous
Pearly, Greasy

Pleochroism

Pale rose-red carmine-red colorlessAnthony et al
For violet varieties

Dispersion

0.040.01
0.005 1
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Transparency

Transparent
Transparent

Refractive Index

1.692-1.7391.570-1.614
1 3.25
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Optic Character

-
-

Crystal System

-
Orthorhombic

Birefringence

0.2400.042-0.044
0 0.296
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Clarity

Transparent
Transparent

Phosphosiderite and Anhydrite Optic Character

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

Phosphosiderite and Anhydrite Transparency

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