Schorl and Friedelite Optical Properties

Schorl

Friedelite

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1 Optical Properties

1.1 Luster

Vitreous

Not Available

1.2 Pleochroism

Very strong: yellow-brown pale yellow

NilArthur Thomas

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent, Translucent

Translucent

1.5 Refractive Index

1.635-1.6721.627-1.663

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

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

1.8 Birefringence

0.0250.032-0.035

0 0.296

1.9 Clarity

Transparent

Translucent

Schorl and Friedelite Optic Character

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

Schorl Vs Xenotime

Schorl Vs Triplite

Schorl and Friedelite Transparency

Similar to their colors, Schorl and Friedelite 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.