Brucite and Astrophyllite Optical Properties

Brucite

Astrophyllite

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1 Optical Properties

1.1 Luster

Vitreous, Pearly

Greasy, Pearly

1.2 Pleochroism

Not Available

Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

TransparentMichael OâDonoghue, Gems, Sixth Edition (2006)

Translucent

1.5 Refractive Index

1.56-1.601.678-1.758

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

Triclinic

1.8 Birefringence

0.010-0.0200.050

0 0.296

1.9 Clarity

TransparentMichael OâDonoghue

Translucent

Brucite and Astrophyllite Optic Character

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

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