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Cordierite
Cordierite

Phlogopite
Phlogopite



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Cordierite
X
Phlogopite

Cordierite and Phlogopite Optical Properties

1 Optical Properties
1.1 Luster
Greasy, Vitreous
Pearly
1.2 Pleochroism
X = pale yellow
Not Available
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Not Available
Not Available
1.5 Refractive Index
Not Available1.530-1.573
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
monoclinic
1.8 Birefringence
Not Available0.0280-0.0450
Achroite
0 0.296
1.9 Clarity
Not Available
Not Available

Cordierite and Phlogopite Optic Character

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

Similar to their colors, Cordierite and Phlogopite 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.