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Brucite
Brucite

Sunstone
Sunstone



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Brucite
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Sunstone

Brucite and Sunstone Optical Properties

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Optical Properties

Luster

Vitreous, Pearly
Vitreous

Pleochroism

-
Weak or absentWalter Schumann

Dispersion

0.030.01
0.005 1
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Transparency

TransparentMichael O’Donoghue
Transparent, Translucent, Transparent to translucent

Refractive Index

1.56-1.601.53-1.55
1 3.25
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Optic Character

-
-

Crystal System

Trigonal
Triclinic

Birefringence

0.010-0.0200.007-0.010
0 0.296
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Clarity

TransparentMichael O’Donoghue
Transparent to translucent

Brucite and Sunstone Optic Character

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

Similar to their colors, Brucite and Sunstone 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.