Friedelite and Esperite Optical Properties

Friedelite

Esperite

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1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

NilArthur Thomas

colorless.

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Translucent

OpaqueAnthony et al, Opaque, Transparent

1.5 Refractive Index

1.627-1.6631.760-1.774

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/m

monoclinic

1.8 Birefringence

0.032-0.0350.012

0 0.296

1.9 Clarity

Translucent

OpaqueAnthony et al

Friedelite and Esperite Optic Character

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

Similar to their colors, Friedelite and Esperite 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, Friedelite is Translucent while Friedelite is Translucent in appearance.