Peridot and Erythrite Optical Properties

Peridot

Erythrite

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1 Optical Properties

1.1 Luster

Vitreous, Greasy

Subadamantine, Pearly

1.2 Pleochroism

Weak: yellow-green green (colorless)Herve Nicolas Lazzarelli

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

1.3 Dispersion

0.02NA

0.007 1

1.4 Transparency

Transparent

Not Available

1.5 Refractive Index

1.64-1.691.626-1.629

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

monoclinic

1.8 Birefringence

0.036Not Available

0 0.296

1.9 Clarity

Transparent

Not Available

Peridot and Erythrite Optic Character

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

Similar to their colors, Peridot 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, Peridot is Transparent while Peridot is Transparent in appearance.