Sard and Erythrite Optical Properties

Sard

Erythrite

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1 Optical Properties

1.1 Luster

Waxy

Subadamantine, Pearly

1.2 Pleochroism

AbsentWalter Schumann

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

1.3 Dispersion

NoneNA

0.007 1

1.4 Transparency

Translucent

Not Available

1.5 Refractive Index

1.535-1.5391.626-1.629

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

monoclinic

1.8 Birefringence

0.008-0.010Not Available

0 0.296

1.9 Clarity

Translucent

Not Available

Sard and Erythrite Optic Character

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

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Sard and Erythrite Transparency

Similar to their colors, Sard 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, Sard is Translucent while Sard is Translucent in appearance.