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Ludlamite
Ludlamite

Phosgenite
Phosgenite



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Ludlamite
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Phosgenite

Ludlamite and Phosgenite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, 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
Gemmological Tables (2004) More from other references
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.653-1.6932.117-2.145
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
tetragonal
1.8 Birefringence
0.038-0.0440.027
Achroite
0 0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
TransparentUlrich Henn and Claudio C. Milisenda

Ludlamite and Phosgenite Optic Character

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

Ludlamite and Phosgenite Transparency

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