Cordierite and Erythrite Optical Properties

Cordierite

Erythrite

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1 Optical Properties

1.1 Luster

Greasy, Vitreous

Subadamantine, Pearly

1.2 Pleochroism

X = pale yellow

Visible: X = pale pinkish to pale rose; Y = pale violet to pale violet-rose; Z = deep red

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

1.5 Refractive Index

Not Available1.626-1.629

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

monoclinic

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Not Available

Cordierite and Erythrite Optic Character

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

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Cordierite and Erythrite Transparency

Similar to their colors, Cordierite and Erythrite 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.