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Brucite
Brucite

Bastnasite
Bastnasite



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Brucite
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Bastnasite

Brucite and Bastnasite Optical Properties

Optical Properties

Luster

Vitreous, Pearly
Vitreous, Greasy, Pearly

Pleochroism

-
Faint

Dispersion

0.030.02
0.005 1
👆🏻

Transparency

TransparentMichael O’Donoghue
-

Refractive Index

1.56-1.601.717-1.722
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Trigonal
Hexagonal

Birefringence

0.010-0.0200.100
0 0.296
👆🏻

Clarity

TransparentMichael O’Donoghue
TransparentUlrich Henn and Claudio C. Milisenda

Brucite and Bastnasite Optic Character

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

Similar to their colors, Brucite and Bastnasite 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.