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Brucite
Brucite

Anthophyllite
Anthophyllite



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Brucite
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Anthophyllite

Brucite and Anthophyllite Optical Properties

Optical Properties

Luster

Vitreous, Pearly
Vitreous, Pearly

Pleochroism

-
-

Dispersion

0.030.01
0.005 1
👆🏻

Transparency

TransparentMichael O’Donoghue
Transparent

Refractive Index

1.56-1.601.603-1.690
1 3.25
👆🏻

Optic Character

-
Biaxial/+

Crystal System

Trigonal
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma

Birefringence

0.010-0.020-9999
0 0.296
👆🏻

Clarity

TransparentMichael O’Donoghue
Transparent

Brucite and Anthophyllite Optic Character

Brucite and Anthophyllite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Brucite and Anthophyllite 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 Anthophyllite 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. Anthophyllite has Biaxial/+ character.

Brucite and Anthophyllite Transparency

Similar to their colors, Brucite and Anthophyllite 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.