Brucite and Demantoid Optical Properties

Brucite

Demantoid

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1 Optical Properties

1.1 Luster

Vitreous, Pearly

Adamantine

1.2 Pleochroism

Not Available

None

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

TransparentMichael OâDonoghue, Gems, Sixth Edition (2006)

Gemmological Tables (2004)

1.5 Refractive Index

1.56-1.601.880-1.890

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

cubic

1.8 Birefringence

0.010-0.020Not Available

0 0.296

1.9 Clarity

TransparentMichael OâDonoghue

TransparentUlrich Henn and Claudio C. Milisenda

Brucite and Demantoid Optic Character

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

Similar to their colors, Brucite and Demantoid 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.