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Jet
Jet

Fayalite
Fayalite



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Jet and Fayalite Optical Properties

Jet
Jet
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1 Optical Properties
1.1 Luster
Waxy
Vitreous, Resinous
1.2 Pleochroism
AbsentWalter Schumann
Faint
1.3 Dispersion
NoneNA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
TransparentAnthony et al, Handbook of mineralogy (2001)
1.5 Refractive Index
1.640-1.6801.827-1.879
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Amorphous
Orthorhombic
1.8 Birefringence
Not Available0.042-0.051
Achroite
0 0.296
1.9 Clarity
Gemmological Tables (2004) More from other references
TransparentAnthony et al

Jet and Fayalite Optic Character

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

Jet and Fayalite Transparency

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