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Pumpellyite
Pumpellyite

Nuummite
Nuummite



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Pumpellyite
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Nuummite

Pumpellyite and Nuummite Optical Properties

1 Optical Properties
1.1 Luster
Fibrous
Not Available
1.2 Pleochroism
Not Available
Not Available
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004)
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.674-1.7641.635-1.663
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
Not Available
1.8 Birefringence
0.014-0.0160.0170-0.230
Achroite
0 0.296
1.9 Clarity
OpaqueUlrich Henn and Claudio C. Milisenda
Gemmological Tables (2004) More from other references

Pumpellyite and Nuummite Optic Character

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

Pumpellyite and Nuummite Transparency

Similar to their colors, Pumpellyite 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, Pumpellyite is Gemmological Tables (2004) while Pumpellyite is Gemmological Tables (2004) in appearance.