Pyrite and Dumortierite Optical Properties

Pyrite

Dumortierite

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1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

Not Available

Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue

1.3 Dispersion

NoneNone

0.007 1

1.4 Transparency

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

Translucent, Translucent to opaque

1.5 Refractive Index

Not Available1.669-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Isometric

Orthorhombic

1.8 Birefringence

Not Available0.011-0.037

0 0.296

1.9 Clarity

OpaqueHerve Nicolas Lazzarelli

Translucent

Pyrite and Dumortierite Optic Character

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

Similar to their colors, Pyrite and Dumortierite 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.