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Phosgenite
Phosgenite

Pyrophyllite
Pyrophyllite



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Phosgenite
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Pyrophyllite

Phosgenite and Pyrophyllite Optical Properties

1 Optical Properties
1.1 Luster
Adamantine
Pearly
1.2 Pleochroism
Weakly pleochroic with O reddish and E greenish in thick sections.
NilArthur Thomas
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
Translucent
1.5 Refractive Index
2.117-2.1451.534-1.601
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
tetragonal
Not Available
1.8 Birefringence
0.0270.050
Achroite
0 0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Translucent

Phosgenite and Pyrophyllite Optic Character

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

Phosgenite and Pyrophyllite Transparency

Similar to their colors, Phosgenite 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, Phosgenite is Gemmological Tables (2004) More from other references while Phosgenite is Gemmological Tables (2004) More from other references in appearance.