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Brucite
Brucite

Phenakite
Phenakite



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Brucite
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Phenakite

Brucite and Phenakite Optical Properties

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Optical Properties

Luster

Vitreous, Pearly
Vitreous

Pleochroism

-
Distinct: colorless orangy-yellowHerve Nicolas Lazzarelli

Dispersion

0.030.02
0.005 1
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Transparency

TransparentMichael O’Donoghue
-

Refractive Index

1.56-1.601.650-1.695
1 3.25
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Optic Character

-
-

Crystal System

Trigonal
Trigonal

Birefringence

0.010-0.0200.016
0 0.296
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Clarity

TransparentMichael O’Donoghue
TransparentUlrich Henn and Claudio C. Milisenda

Brucite and Phenakite Optic Character

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

Similar to their colors, Brucite and Phenakite 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.