Austinite and Dumortierite Optical Properties

Austinite

Dumortierite

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1 Optical Properties

1.1 Luster

Subadamantine, Silky, Fibrous

Vitreous

1.2 Pleochroism

Not Available

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

Not Available

Translucent, Translucent to opaque

1.5 Refractive Index

1.7591.669-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

1.8 Birefringence

0.0240.011-0.037

0 0.296

1.9 Clarity

Not Available

Translucent

Austinite and Dumortierite Optic Character

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

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Austinite Vs Clintonite

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Austinite Vs Cordierite

Austinite and Dumortierite Transparency

Similar to their colors, Austinite 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, Austinite is Not Available while Austinite is Not Available in appearance.