Schorl and Dumortierite Optical Properties

Schorl

Dumortierite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Very strong: yellow-brown pale yellow

Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue

1.3 Dispersion

NANone

0.007 1

1.4 Transparency

Transparent, Translucent

Translucent, Translucent to opaque

1.5 Refractive Index

1.635-1.6721.669-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Orthorhombic

1.8 Birefringence

0.0250.011-0.037

0 0.296

1.9 Clarity

Transparent

Translucent

Schorl and Dumortierite Optic Character

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

Schorl Vs Triplite

Schorl and Dumortierite Transparency

Similar to their colors, Schorl and Dumortierite 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.