Esperite and Dumortierite Optical Properties

Esperite

Dumortierite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

colorless.

Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue

1.3 Dispersion

NANone

0.007 1

1.4 Transparency

OpaqueAnthony et al, Opaque, Transparent

Translucent, Translucent to opaque

1.5 Refractive Index

1.760-1.7741.669-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

Orthorhombic

1.8 Birefringence

0.0120.011-0.037

0 0.296

1.9 Clarity

OpaqueAnthony et al

Translucent

Esperite and Dumortierite Optic Character

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

Similar to their colors, Esperite and Dumortierite 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, Esperite is Opaque, OpaqueAnthony et al and Transparent while Esperite is Opaque, OpaqueAnthony et al and Transparent in appearance.