Cryolite and Omphacite Optical Properties

Cryolite

Omphacite

Add ⊕

1 Optical Properties

1.1 Luster

Vitreous, Greasy, Pearly

Vitreous

1.2 Pleochroism

colorless.

Weak: colorless -- very pale green -- very pale green

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Gemmological Tables (2004) More from other references

TranslucentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

1.338-1.3391.662-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

Not Available

1.8 Birefringence

0.001Not Available

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

TranslucentAnthony et al

Cryolite and Omphacite Optic Character

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

Cryolite Vs Fluorite

Cryolite Vs Fire Opal

Cryolite Vs Franklinite

Cryolite and Omphacite Transparency

Similar to their colors, Cryolite and Omphacite 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, Cryolite is Gemmological Tables (2004) More from other references while Cryolite is Gemmological Tables (2004) More from other references in appearance.