Cordierite and Crocoite Optical Properties

Cordierite

Crocoite

Add ⊕

1 Optical Properties

1.1 Luster

Greasy, Vitreous

Adamantine

1.2 Pleochroism

X = pale yellow

Distinctly trichroic

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

Transparent

1.5 Refractive Index

Not Available2.31-2.66

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

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

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Not Available

Transparent

Cordierite and Crocoite Optic Character

Cordierite and Crocoite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Cordierite and Crocoite 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 Cordierite and Crocoite 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 Blue Gemstones

Cordierite Vs Riebeckite

Cordierite Vs Rosasite

Cordierite Vs Plumbogummite

Cordierite and Crocoite Transparency

Similar to their colors, Cordierite and Crocoite 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, Cordierite is Not Available while Cordierite is Not Available in appearance.