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Allanite
Allanite

Cobaltite
Cobaltite



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Allanite
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Cobaltite

Allanite and Cobaltite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Not Available
1.2 Pleochroism
Not Available
Very weak
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Not Available
Gems
1.5 Refractive Index
1Not Available
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: P ca21
1.8 Birefringence
0.013-0.036Not Available
Achroite
0 0.296
1.9 Clarity
Not Available
Gems

Allanite and Cobaltite Optic Character

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

Allanite and Cobaltite Transparency

Similar to their colors, Allanite and Cobaltite 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, Allanite is Not Available while Allanite is Not Available in appearance.