Cordierite and Rosasite Optical Properties

Cordierite

Rosasite

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1 Optical Properties

1.1 Luster

Greasy, Vitreous

Silky, Vitreous

1.2 Pleochroism

X = pale yellow

Strong: X = pale emerald green or colourless; Y = dark emerald green or pale blue; Z = dark emerald green or pale blue

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

1.5 Refractive Index

Not Available1.672-1.688

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

monoclinic

1.8 Birefringence

Not Available0.139-0.143

0 0.296

1.9 Clarity

Not Available

Cordierite and Rosasite Optic Character

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

Similar to their colors, Cordierite and Rosasite 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.