Ruby and Foitite Optical Properties

Ruby

Foitite

Add ⊕

1 Optical Properties

1.1 Luster

Vitreous, Adamantine, Vitreous, Adamantine

Vitreous

1.2 Pleochroism

Strong: purplish-red

Strong: pale lavender dark blueAnthony et al

1.3 Dispersion

0.02NA

0.007 1

1.4 Transparency

Transparent, Translucent, Transparent to opaque

TranslucentAnthony et al, Translucent

1.5 Refractive Index

1.762-1.778Not Available

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m

1.8 Birefringence

0.008Not Available

0 0.296

1.9 Clarity

Transparent

TranslucentAnthony et al

Ruby and Foitite Optic Character

Ruby and Foitite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Ruby and Foitite 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 Ruby and Foitite 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 Birthstones » More

Ruby Vs Opal

Ruby Vs Diamond

Ruby Vs Emerald

» More

More Compare Birthstones

Ruby and Foitite Transparency

Similar to their colors, Ruby and Foitite 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, Ruby is Translucent, Transparent and Transparent to opaque while Ruby is Translucent, Transparent and Transparent to opaque in appearance.