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Brucite
Brucite

Anhydrite
Anhydrite



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Brucite
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Anhydrite

Brucite and Anhydrite Optical Properties

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Optical Properties

Luster

Vitreous, Pearly
Pearly, Greasy

Pleochroism

-
For violet varieties

Dispersion

0.030.01
0.005 1
👆🏻

Transparency

TransparentMichael O’Donoghue
Transparent

Refractive Index

1.56-1.601.570-1.614
1 3.25
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Optic Character

-
-

Crystal System

Trigonal
Orthorhombic

Birefringence

0.010-0.0200.042-0.044
0 0.296
👆🏻

Clarity

TransparentMichael O’Donoghue
Transparent

Brucite and Anhydrite Optic Character

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

Brucite and Anhydrite Transparency

Similar to their colors, Brucite 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, Brucite is TransparentMichael O’Donoghue while Brucite is TransparentMichael O’Donoghue in appearance.