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Cordierite
Cordierite

Lapis lazuli
Lapis lazuli



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Cordierite
X
Lapis lazuli

Cordierite and Lapis lazuli Optical Properties

1 Optical Properties
1.1 Luster
Greasy, Vitreous
Vitreous, Greasy
1.2 Pleochroism
X = pale yellow
AbsentWalter Schumann
1.3 Dispersion
NANone
Fluorite Optical Properties
0.007 1
1.4 Transparency
Not Available
Opaque
1.5 Refractive Index
Not Available1.500-1.670
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Trigonal
1.8 Birefringence
Not AvailableNot Available
Achroite
0 0.296
1.9 Clarity
Not Available
Gemstones of the world (2001)

Cordierite and Lapis lazuli Optic Character

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

Similar to their colors, Cordierite and Lapis lazuli 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.