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Fayalite
Fayalite

Pumpellyite
Pumpellyite



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Fayalite
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Pumpellyite

Fayalite and Pumpellyite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Resinous
Fibrous
1.2 Pleochroism
Faint
Not Available
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
TransparentAnthony et al, Handbook of mineralogy (2001)
Gemmological Tables (2004)
1.5 Refractive Index
1.827-1.8791.674-1.764
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
monoclinic
1.8 Birefringence
0.042-0.0510.014-0.016
Achroite
0 0.296
1.9 Clarity
TransparentAnthony et al
OpaqueUlrich Henn and Claudio C. Milisenda

Fayalite and Pumpellyite Optic Character

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

Fayalite and Pumpellyite Transparency

Similar to their colors, Fayalite and Pumpellyite 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, Fayalite is Handbook of mineralogy (2001) and TransparentAnthony et al while Fayalite is Handbook of mineralogy (2001) and TransparentAnthony et al in appearance.