Brucite and Antigorite Optical Properties

Brucite

Antigorite

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1 Optical Properties

1.1 Luster

Vitreous, Pearly

Waxy, Silky, Resinous, Greasy

1.2 Pleochroism

Not Available

pale greenish yellow.

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

TransparentMichael OâDonoghue, Gems, Sixth Edition (2006)

Translucent

1.5 Refractive Index

1.56-1.601.530-1.575

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

Monoclinic Domatic H-M Symbol (m) Space Group: Cm

1.8 Birefringence

0.010-0.020Not Available

0 0.296

1.9 Clarity

TransparentMichael OâDonoghue

Translucent

Brucite and Antigorite Optic Character

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

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Brucite and Antigorite Transparency

Similar to their colors, Brucite and Antigorite 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 Gems, Sixth Edition (2006) and TransparentMichael OâDonoghue while Brucite is Gems, Sixth Edition (2006) and TransparentMichael OâDonoghue in appearance.