Schorl and Cordierite Optical Properties

Schorl

Cordierite

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1 Optical Properties

1.1 Luster

Vitreous

Greasy, Vitreous

1.2 Pleochroism

Very strong: yellow-brown pale yellow

X = pale yellow

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent, Translucent

Not Available

1.5 Refractive Index

1.635-1.672Not Available

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Orthorhombic

1.8 Birefringence

0.025Not Available

0 0.296

1.9 Clarity

Transparent

Not Available

Schorl and Cordierite Optic Character

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

Compare Black Gemstones

Schorl Vs Xenotime

Schorl Vs Triplite

Schorl Vs Snowflake Obsidian

Schorl and Cordierite Transparency

Similar to their colors, Schorl and Cordierite 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, Schorl is Translucent and Transparent while Schorl is Translucent and Transparent in appearance.