Thulite and Mimetite Optical Properties

Thulite

Mimetite

Add ⊕

Optical Properties

Luster

Vitreous

Resinous, Subadamantine

Pleochroism

Present

Weak

Dispersion

0.020.04

0.005 1

👆🏻

Transparency

Opaque, Translucent, Opaque . May be translucent in thin backlit sections.

Translucent

Refractive Index

1.6952.106-2.263

1 3.25

👆🏻

Optic Character

Crystal System

Orthorhombic

Hexagonal

Birefringence

0.006-0.0180.019

0 0.296

👆🏻

Clarity

OpaqueHerve Nicolas Lazzarelli

Translucent

Thulite and Mimetite Optic Character

Thulite and Mimetite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Thulite and Mimetite 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 Thulite and Mimetite 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 Red Gemstones

Thulite Vs Wulfenite

Thulite Vs Garnet Color Change

Thulite Vs Hessonite Garnet

Thulite and Mimetite Transparency

Similar to their colors, Thulite and Mimetite 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, Thulite is Opaque, Translucent and Opaque . May be translucent in thin backlit sections. while Thulite is Opaque, Translucent and Opaque . May be translucent in thin backlit sections. in appearance.