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Phosgenite
Phosgenite

Cordierite
Cordierite



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Cordierite

Phosgenite and Cordierite Optical Properties

1 Optical Properties
1.1 Luster
Adamantine
Greasy, Vitreous
1.2 Pleochroism
Weakly pleochroic with O reddish and E greenish in thick sections.
X = pale yellow
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Gemmological Tables (2004) More from other references
Not Available
1.5 Refractive Index
2.117-2.145
Not Available
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
tetragonal
Orthorhombic
1.8 Birefringence
0.027
Not Available
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Not Available

Phosgenite and Cordierite Optic Character

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

Similar to their colors, Phosgenite and Cordierite 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.