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Brucite
Brucite

Apatite
Apatite



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Brucite
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Apatite

Brucite and Apatite Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous, Pearly
Vitreous
1.2 Pleochroism
Not Available
Blue stones – strong
1.3 Dispersion
NA0.01
Fluorite Optical Properties
0.007 1
1.4 Transparency
TransparentMichael O’Donoghue, Gems, Sixth Edition (2006)
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.56-1.601.628-1.651
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
Hexagonal
1.8 Birefringence
0.010-0.0200.002-0.008
Achroite
0 0.296
1.9 Clarity
TransparentMichael O’Donoghue
TransparentUlrich Henn and Claudio C. Milisenda

Brucite and Apatite Optic Character

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

Brucite and Apatite Transparency

Similar to their colors, Brucite and Apatite 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 O’Donoghue while Brucite is Gems, Sixth Edition (2006) and TransparentMichael O’Donoghue in appearance.