Pyrite and Powellite Optical Properties

Pyrite

Powellite

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1 Optical Properties

1.1 Luster

Not Available

Greasy, Subadamantine

1.2 Pleochroism

Not Available

In deeply colored specimens: blue greenAnthony et al

1.3 Dispersion

NoneNA

0.007 1

1.4 Transparency

OpaqueHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references

Transparent

1.5 Refractive Index

Not Available1.974-1.984

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Isometric

Not Available

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

OpaqueHerve Nicolas Lazzarelli

Transparent

Pyrite and Powellite Optic Character

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

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Pyrite and Powellite Transparency

Similar to their colors, Pyrite and Powellite 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, Pyrite is Blue Chart Gem Identification (2010) More from other references and OpaqueHerve Nicolas Lazzarelli while Pyrite is Blue Chart Gem Identification (2010) More from other references and OpaqueHerve Nicolas Lazzarelli in appearance.