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Feldspar
Feldspar

Zoisite
Zoisite



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X
Feldspar
X
Zoisite

Feldspar and Zoisite Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous
Vitreous
1.2 Pleochroism
None
X = pale pink to red-violet; Y = nearly colorless to bright pink or deep blue; Z = pale yellow to yellow-green
1.3 Dispersion
NA0.02
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent
Transparent, Translucent, Opaque . May be translucent in thin backlit sections.
1.5 Refractive Index
1.518-1.5701.685-1.707
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Triclinic or monoclinic
Orthorhombic
1.8 Birefringence
0.008-0.0100.006-0.018
Achroite
0 0.296
1.9 Clarity
Transparent
Transparent

Feldspar and Zoisite Optic Character

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

Feldspar and Zoisite Transparency

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