Esperite and Inderite Optical Properties

Esperite

Inderite

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1 Optical Properties

1.1 Luster

Vitreous

Vitreous, Pearly, Greasy

1.2 Pleochroism

colorless.

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

OpaqueAnthony et al, Opaque, Transparent

Gemmological Tables (2004)

1.5 Refractive Index

1.760-1.7741.488-1.505

1 3.25

1.6 Optic Character

Not Available

Biaxial/+

1.7 Crystal System

monoclinic

Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a

1.8 Birefringence

0.0120.017

0 0.296

1.9 Clarity

OpaqueAnthony et al

TransparentUlrich Henn and Claudio C. Milisenda

Esperite and Inderite Optic Character

Esperite and Inderite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Esperite and Inderite 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 Inderite 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. Inderite has Biaxial/+ character.

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Esperite and Inderite Transparency

Similar to their colors, Esperite and Inderite 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.