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Herderite
Herderite

Powellite
Powellite



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Herderite
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Powellite

Herderite and Powellite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Greasy, Subadamantine
1.2 Pleochroism
Not Available
In deeply colored specimens: blue greenAnthony et al
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Transparent
1.5 Refractive Index
1.587-1.6421.974-1.984
Agate Opal
1 3.25
1.6 Optic Character
Biaxial/+
Not Available
1.7 Crystal System
monoclinic
Not Available
1.8 Birefringence
0.028-0.032Not Available
Achroite
0 0.296
1.9 Clarity
Transparent
Transparent

Herderite and Powellite Optic Character

Herderite and Powellite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Herderite and Powellite 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 Herderite and Powellite 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. Herderite has Biaxial/+ character.

Herderite and Powellite Transparency

Similar to their colors, Herderite and Powellite 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, Herderite is Transparent while Herderite is Transparent in appearance.