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Nuummite
Nuummite

Apophyllite
Apophyllite



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Nuummite
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Apophyllite

Nuummite and Apophyllite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Vitreous, Pearly
1.2 Pleochroism
Not Available
Dichroic (colorless)
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
Transparent, Translucent
1.5 Refractive Index
1.635-1.6631.530-1.543
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Uniaxial/-
1.7 Crystal System
Not Available
tetragonal
1.8 Birefringence
0.0170-0.2300.000-0.003
Achroite
0 0.296
1.9 Clarity
Gemmological Tables (2004) More from other references
Transparent

Nuummite and Apophyllite Optic Character

Nuummite and Apophyllite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Nuummite and Apophyllite 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 Nuummite and Apophyllite 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. Apophyllite has Uniaxial/- character.

Nuummite and Apophyllite Transparency

Similar to their colors, Nuummite and Apophyllite 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, Nuummite is Gemmological Tables (2004) More from other references while Nuummite is Gemmological Tables (2004) More from other references in appearance.