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Phosphosiderite
Phosphosiderite

Andalusite
Andalusite



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Phosphosiderite
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Andalusite

Phosphosiderite and Andalusite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous, Greasy
1.2 Pleochroism
Pale rose-red carmine-red colorlessAnthony et al
strongly trichroic
1.3 Dispersion
NA0.02
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Transparent, Translucent
1.5 Refractive Index
1.692-1.7391.627-1.650
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
Orthorhombic
1.8 Birefringence
0.2400.009-0.010
Achroite
0 0.296
1.9 Clarity
Transparent
Transparent

Phosphosiderite and Andalusite Optic Character

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

Phosphosiderite and Andalusite Transparency

Similar to their colors, Phosphosiderite and Andalusite 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, Phosphosiderite is Transparent while Phosphosiderite is Transparent in appearance.