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Allanite
Allanite

Erythrite
Erythrite



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Allanite
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Erythrite

Allanite and Erythrite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Subadamantine, Pearly
1.2 Pleochroism
Not Available
Visible: X = pale pinkish to pale rose; Y = pale violet to pale violet-rose; Z = deep red
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Not Available
Not Available
1.5 Refractive Index
1
1.626-1.629
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
monoclinic
1.8 Birefringence
0.013-0.036
Not Available
1.9 Clarity
Not Available
Not Available

Allanite and Erythrite Optic Character

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

Similar to their colors, Allanite and Erythrite 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.

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