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Cordierite
Cordierite

Prasiolite
Prasiolite



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Cordierite
X
Prasiolite

Cordierite and Prasiolite Optical Properties

1 Optical Properties
1.1 Luster
Greasy, Vitreous
Vitreous
1.2 Pleochroism
X = pale yellow
Very weak: light green pale greenWalter Schumann
1.3 Dispersion
NA0.01
Fluorite Optical Properties
0.007 1
1.4 Transparency
Not Available
Transparent, Translucent
1.5 Refractive Index
Not Available1.544-1.553
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Trigonal
1.8 Birefringence
Not Available0.009
Achroite
0 0.296
1.9 Clarity
Not Available
Transparent

Cordierite and Prasiolite Optic Character

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

Similar to their colors, Cordierite and Prasiolite 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.