Thulite and Gypsum Optical Properties

Thulite

Gypsum

Add ⊕

Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

Vitreous

Present

0.02

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

1.695

Orthorhombic

0.006-0.018

OpaqueHerve Nicolas Lazzarelli

Vitreous, Silky, Pearly, Waxy

None

0.01

Transparent, Translucent

1.521-1.531

monoclinic

0.010

Transparent

Thulite and Gypsum Optic Character

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

Similar to their colors, Thulite and Gypsum 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.