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Pargasite
Pargasite

Herderite
Herderite



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Pargasite
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Herderite

Pargasite and Herderite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous
1.2 Pleochroism
Not Available
Not Available
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Transparent
1.5 Refractive Index
1.613-1.6631.587-1.642
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Biaxial/+
1.7 Crystal System
monoclinic
monoclinic
1.8 Birefringence
0.0200.028-0.032
Achroite
0 0.296
1.9 Clarity
Transparent
Transparent

Pargasite and Herderite Optic Character

Pargasite and Herderite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Pargasite and Herderite 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 Pargasite and Herderite 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. Herderite has Biaxial/+ character.

Pargasite and Herderite Transparency

Similar to their colors, Pargasite and Herderite 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, Pargasite is Transparent while Pargasite is Transparent in appearance.