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Phosphophyllite
Phosphophyllite

Sugilite
Sugilite



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Phosphophyllite
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Sugilite

Phosphophyllite and Sugilite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Vitreous
1.2 Pleochroism
NilArthur Thomas
Weak
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
Translucent
1.5 Refractive Index
1.595-1.6211.607-1.612
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
Hexagonal
1.8 Birefringence
0.0210.003
Achroite
0 0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Translucent

Phosphophyllite and Sugilite Optic Character

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

Phosphophyllite and Sugilite Transparency

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