Brucite and Thulite Optical Properties

Brucite

Thulite

Add ⊕

1 Optical Properties

1.1 Luster

Vitreous, Pearly

Vitreous

1.2 Pleochroism

Not Available

Present

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

TransparentMichael OâDonoghue, Gems, Sixth Edition (2006)

Opaque, Translucent, Opaque . May be translucent in thin backlit sections.

1.5 Refractive Index

1.56-1.601.695

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

Orthorhombic

1.8 Birefringence

0.010-0.0200.006-0.018

0 0.296

1.9 Clarity

TransparentMichael OâDonoghue

OpaqueHerve Nicolas Lazzarelli

Brucite and Thulite Optic Character

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

Compare Blue Gemstones

Brucite Vs Chrysocolla

Brucite Vs Chrome Tourmaline

Brucite Vs Common Opal

Brucite and Thulite Transparency

Similar to their colors, Brucite and Thulite 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.