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Pumpellyite
Pumpellyite

Fayalite
Fayalite



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Pumpellyite
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Fayalite

Pumpellyite and Fayalite Optical Properties

1 Optical Properties
1.1 Luster
Fibrous
Vitreous, Resinous
1.2 Pleochroism
Not Available
Faint
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004)
TransparentAnthony et al, Handbook of mineralogy (2001)
1.5 Refractive Index
1.674-1.7641.827-1.879
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
Orthorhombic
1.8 Birefringence
0.014-0.0160.042-0.051
Achroite
0 0.296
1.9 Clarity
OpaqueUlrich Henn and Claudio C. Milisenda
TransparentAnthony et al

Pumpellyite and Fayalite Optic Character

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

Similar to their colors, Pumpellyite and Fayalite 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.