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Natrolite
Natrolite

Phosgenite
Phosgenite



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Natrolite
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Phosgenite

Natrolite and Phosgenite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Silky, Pearly
Adamantine
1.2 Pleochroism
NilArthur Thomas
Weakly pleochroic with O reddish and E greenish in thick sections.
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.478-1.4932.117-2.145
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
tetragonal
1.8 Birefringence
0.012-0.0130.027
Achroite
0 0.296
1.9 Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Natrolite and Phosgenite Optic Character

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

Natrolite and Phosgenite Transparency

Similar to their colors, Natrolite 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, Natrolite is Translucent and Transparent while Natrolite is Translucent and Transparent in appearance.