Esperite and Almandine Optical Properties

Esperite

Almandine

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1 Optical Properties

1.1 Luster

Vitreous

Greasy, Vitreous

1.2 Pleochroism

colorless.

None

1.3 Dispersion

NA0.03

0.007 1

1.4 Transparency

OpaqueAnthony et al, Opaque, Transparent

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.760-1.7741.770-1.820

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

cubic

1.8 Birefringence

0.012Not Available

0 0.296

1.9 Clarity

OpaqueAnthony et al

TransparentUlrich Henn and Claudio C. Milisenda

Esperite and Almandine Optic Character

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

Similar to their colors, Esperite and Almandine 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.