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Franklinite
Franklinite

Brucite
Brucite



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Franklinite and Brucite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Vitreous, Pearly
1.2 Pleochroism
Not Available
Not Available
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Translucent
TransparentMichael O’Donoghue, Gems, Sixth Edition (2006)
1.5 Refractive Index
Not Available
1.56-1.60
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Isometric Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m
Trigonal
1.8 Birefringence
Not Available
0.010-0.020
1.9 Clarity
Translucent
TransparentMichael O’Donoghue

Franklinite and Brucite Optic Character

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

Franklinite and Brucite Transparency

Similar to their colors, Franklinite 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, Franklinite is Translucent while Franklinite is Translucent in appearance.