×

Brucite
Brucite

Bertrandite
Bertrandite



ADD
Compare
X
Brucite
X
Bertrandite

Brucite and Bertrandite Optical Properties

Optical Properties

Luster

Vitreous, Pearly
Vitreous

Pleochroism

-
none.

Dispersion

0.030.01
0.005 1
👆🏻

Transparency

TransparentMichael O’Donoghue
TransparentAnthony et al

Refractive Index

1.56-1.601.583-1.614
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Trigonal
Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: Ccm21

Birefringence

0.010-0.020-9999
0 0.296
👆🏻

Clarity

TransparentMichael O’Donoghue
TransparentAnthony et al

Brucite and Bertrandite Optic Character

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

Similar to their colors, Brucite and Bertrandite 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.