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Cordierite
Cordierite

Adularia
Adularia



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Cordierite
X
Adularia

Cordierite and Adularia Optical Properties

1 Optical Properties
1.1 Luster
Greasy, Vitreous
Not Available
1.2 Pleochroism
X = pale yellow
Not Available
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Not Available
TransparentArthur Thomas, Gemstones (2009)
1.5 Refractive Index
Not Available1.518-1.536
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Not Available
1.8 Birefringence
Not Available0.005-0.008
Achroite
0 0.296
1.9 Clarity
Not Available
TransparentArthur Thomas

Cordierite and Adularia Optic Character

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

Similar to their colors, Cordierite and Adularia 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.