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Phlogopite
Phlogopite

Gibbsite
Gibbsite



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Phlogopite
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Gibbsite

Phlogopite and Gibbsite Optical Properties

1 Optical Properties
1.1 Luster
Pearly
Vitreous, Pearly
1.2 Pleochroism
Not Available
colorless.
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Not Available
Not Available
1.5 Refractive Index
1.530-1.573Not Available
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
monoclinic
1.8 Birefringence
0.0280-0.0450Not Available
Achroite
0 0.296
1.9 Clarity
Not Available
Not Available

Phlogopite and Gibbsite Optic Character

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

Phlogopite and Gibbsite Transparency

Similar to their colors, Phlogopite and Gibbsite 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, Phlogopite is Not Available while Phlogopite is Not Available in appearance.