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Holmquistite
Holmquistite

Pyrophyllite
Pyrophyllite



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Holmquistite
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Pyrophyllite

Holmquistite and Pyrophyllite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Pearly
1.2 Pleochroism
Strong in shades of violet when dark-colored.Anthony et al
NilArthur Thomas
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Translucent
1.5 Refractive Index
1.622-1.6661.534-1.601
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
Not Available
1.8 Birefringence
Not Available0.050
Achroite
0 0.296
1.9 Clarity
Transparent
Translucent

Holmquistite and Pyrophyllite Optic Character

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

Holmquistite and Pyrophyllite Transparency

Similar to their colors, Holmquistite and Pyrophyllite 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, Holmquistite is Transparent while Holmquistite is Transparent in appearance.