Feldspar and Erythrite Optical Properties

Feldspar

Erythrite

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1 Optical Properties

1.1 Luster

Vitreous

Subadamantine, Pearly

1.2 Pleochroism

None

Visible: X = pale pinkish to pale rose; Y = pale violet to pale violet-rose; Z = deep red

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent, Translucent

Not Available

1.5 Refractive Index

1.518-1.5701.626-1.629

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Triclinic or monoclinic

monoclinic

1.8 Birefringence

0.008-0.010Not Available

0 0.296

1.9 Clarity

Transparent

Not Available

Feldspar and Erythrite Optic Character

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

Compare Green Gemstones

Feldspar Vs Gaspite

Feldspar Vs Garnet

Feldspar Vs Glass

Feldspar and Erythrite Transparency

Similar to their colors, Feldspar and Erythrite 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.