Friedelite and Colemanite Optical Properties

Friedelite

Colemanite

Add ⊕

1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

NilArthur Thomas

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Translucent

Transparent

1.5 Refractive Index

1.627-1.6631.584-1.615

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/m

Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a

1.8 Birefringence

0.032-0.0350.028-0.030

0 0.296

1.9 Clarity

Translucent

Transparent

Friedelite and Colemanite Optic Character

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

Friedelite Vs Imperial Topaz

Friedelite Vs Hydrogrossular

Friedelite Vs Hibonite

Friedelite and Colemanite Transparency

Similar to their colors, Friedelite and Colemanite 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, Friedelite is Translucent while Friedelite is Translucent in appearance.