Esperite

Cordierite Iolite

Esperite and Cordierite Iolite Optical Properties

Esperite

Cordierite Iolite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

colorless.

Strong trichroism: colorless to yellowish

1.3 Dispersion

Albite Optical ..

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Not Available

Rank: N/A (Overall)▶

0.02

Rank: 22 (Overall)▶

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Fluorite Optical Properties

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0.044 (Anglesite Opt..)

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1.4 Transparency

OpaqueAnthony et al, Opaque, Transparent

Transparent

1.5 Refractive Index

1.760-1.774

1.542-1.578

1.6 Optic Character

Not Available

Biaxial/+

1.7 Crystal System

monoclinic

Not Available

1.8 Birefringence

0.012

0.008-0.012

1.9 Clarity

OpaqueAnthony et al

Transparent

Esperite and Cordierite Iolite Optic Character

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

Compare White Gemstones

Esperite Vs Hackmanite

Esperite Vs Hydrogrossular

Esperite Vs Hardystonite

Esperite and Cordierite Iolite Transparency

Similar to their colors, Esperite and Cordierite Iolite 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.

White Gemstones

Ettringite

Fluorapatite

Forsterite

Goshenite

Hackmanite

Hardystonite