Brucite and Danburite Optical Properties

Brucite

Danburite

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1 Optical Properties

1.1 Luster

Vitreous, Pearly

Vitreous, Greasy

1.2 Pleochroism

Not Available

Weak: pale yellow yellow

1.3 Dispersion

NA0.02

0.007 1

1.4 Transparency

TransparentMichael OâDonoghue, Gems, Sixth Edition (2006)

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.56-1.601.627-1.639

1 3.25

1.6 Optic Character

Not Available

Biaxial/+

1.7 Crystal System

Trigonal

Orthorhombic

1.8 Birefringence

0.010-0.0200.006

0 0.296

1.9 Clarity

TransparentMichael OâDonoghue

TransparentUlrich Henn and Claudio C. Milisenda

Brucite and Danburite Optic Character

Brucite and Danburite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Brucite and Danburite 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 Danburite 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. Danburite has Biaxial/+ character.

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Brucite and Danburite Transparency

Similar to their colors, Brucite and Danburite 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.