Spinel and Powellite Optical Properties

Spinel

Powellite

Add ⊕

Optical Properties

Luster

Vitreous

Greasy, Subadamantine

Pleochroism

Absent

In deeply colored specimens: blue greenAnthony et al

Dispersion

0.020.03

0.005 1

👆🏻

Transparency

Transparent, Translucent, Transparent to translucent

Transparent

Refractive Index

1.731.974-1.984

1 3.25

👆🏻

Optic Character

Crystal System

Isometric

Birefringence

-9999-9999

0 0.296

👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Transparent

Spinel and Powellite Optic Character

Spinel and Powellite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Spinel and Powellite 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 Spinel and Powellite 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 Gems for Scorpio

Spinel Vs Moonstone

Spinel Vs Malachite

Spinel Vs Jasper

Spinel and Powellite Transparency

Similar to their colors, Spinel and Powellite 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, Spinel is Transparent, Translucent and Transparent to translucent while Spinel is Transparent, Translucent and Transparent to translucent in appearance.