Tortoiseshell and Brucite Optical Properties

Tortoiseshell

Brucite

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1 Optical Properties

1.1 Luster

Not Available

Vitreous, Pearly

1.2 Pleochroism

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Gemmological Tables (2004)

TransparentMichael OâDonoghue, Gems, Sixth Edition (2006)

1.5 Refractive Index

1.540-1.5601.56-1.60

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Trigonal

1.8 Birefringence

Not Available0.010-0.020

0 0.296

1.9 Clarity

OpaqueUlrich Henn and Claudio C. Milisenda

TransparentMichael OâDonoghue

Tortoiseshell and Brucite Optic Character

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

Similar to their colors, Tortoiseshell and Brucite 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, Tortoiseshell is Gemmological Tables (2004) while Tortoiseshell is Gemmological Tables (2004) in appearance.