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Allanite
Allanite

Zincite
Zincite



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Allanite
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Zincite

Allanite and Zincite Optical Properties

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1 Optical Properties
1.1 Luster
Not Available
Subadamantine, Resinous
1.2 Pleochroism
Not Available
Very weak
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Not Available
TransparentRobert C. Kammerling, The Journal of Gemmology (1995) More from other references
1.5 Refractive Index
12.013-2.029
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
Hexagonal
1.8 Birefringence
0.013-0.0360.016
Achroite
0 0.296
1.9 Clarity
Not Available
TransparentRobert C. Kammerling

Allanite and Zincite Optic Character

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

Similar to their colors, Allanite and Zincite 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.