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Pearl
Pearl

Phosgenite
Phosgenite



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Pearl and Phosgenite Optical Properties

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1 Optical Properties
1.1 Luster
Pearly
Adamantine
1.2 Pleochroism
AbsentWalter Schumann
Weakly pleochroic with O reddish and E greenish in thick sections.
1.3 Dispersion
NoneNA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent, Opaque
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.52-1.662.117-2.145
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
tetragonal
1.8 Birefringence
0.1560.027
Achroite
0 0.296
1.9 Clarity
Translucent
TransparentUlrich Henn and Claudio C. Milisenda

Pearl and Phosgenite Optic Character

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

Pearl and Phosgenite Transparency

Similar to their colors, Pearl and Phosgenite 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, Pearl is Opaque and Translucent while Pearl is Opaque and Translucent in appearance.