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Pectolite
Pectolite

Cordierite
Cordierite



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X
Pectolite
X
Cordierite

Pectolite and Cordierite Optical Properties

Optical Properties

Luster

Silky
Greasy, Vitreous

Pleochroism

-
X = pale yellow

Dispersion

0.010.01
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

1.595-1.645-9999
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Triclinic
Orthorhombic

Birefringence

0.028-0.038-9999
0 0.296
👆🏻

Clarity

Transparent
-

Pectolite and Cordierite Optic Character

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

Pectolite and Cordierite Transparency

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