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Hercynite
Hercynite

Nuummite
Nuummite



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Hercynite
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Nuummite

Hercynite and Nuummite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Not Available
1.2 Pleochroism
Not Available
Not Available
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.80-1.831.635-1.663
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Isometric Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m
Not Available
1.8 Birefringence
Not Available0.0170-0.230
Achroite
0 0.296
1.9 Clarity
Translucent
Gemmological Tables (2004) More from other references

Hercynite and Nuummite Optic Character

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

Hercynite and Nuummite Transparency

Similar to their colors, Hercynite and Nuummite 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, Hercynite is Translucent while Hercynite is Translucent in appearance.