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Phosgenite
Phosgenite

Sard
Sard



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Phosgenite
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Sard

Phosgenite and Sard Optical Properties

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1 Optical Properties
1.1 Luster
Adamantine
Waxy
1.2 Pleochroism
Weakly pleochroic with O reddish and E greenish in thick sections.
AbsentWalter Schumann
1.3 Dispersion
NANone
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
Translucent
1.5 Refractive Index
2.117-2.1451.535-1.539
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
tetragonal
Not Available
1.8 Birefringence
0.0270.008-0.010
Achroite
0 0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Translucent

Phosgenite and Sard Optic Character

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

Similar to their colors, Phosgenite and Sard 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.