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Cordierite
Cordierite

Larvikite
Larvikite



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Cordierite
X
Larvikite

Cordierite and Larvikite Optical Properties

Optical Properties

Luster

Greasy, Vitreous
Pearly

Pleochroism

X = pale yellow
-

Dispersion

0.010.01
0.005 1
👆🏻

Transparency

-
Transparent, Translucent

Refractive Index

-9999-9999
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
-

Birefringence

-9999-9999
0 0.296
👆🏻

Clarity

-
Transparent

Cordierite and Larvikite Optic Character

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

Cordierite and Larvikite Transparency

Similar to their colors, Cordierite and Larvikite 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 while Cordierite is in appearance.