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Dumortierite
Dumortierite

Pyrargyrite
Pyrargyrite



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Dumortierite
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Pyrargyrite

Dumortierite and Pyrargyrite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Adamantine
1.2 Pleochroism
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue
Distinct
1.3 Dispersion
NoneNA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent, Translucent to opaque
Translucent
1.5 Refractive Index
1.669-1.7232.881-3.084
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Trigonal
1.8 Birefringence
0.011-0.0370.203
Achroite
0 0.296
1.9 Clarity
Translucent
Translucent

Dumortierite and Pyrargyrite Optic Character

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

Dumortierite and Pyrargyrite Transparency

Similar to their colors, Dumortierite and Pyrargyrite 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, Dumortierite is Translucent and Translucent to opaque while Dumortierite is Translucent and Translucent to opaque in appearance.