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Pleonaste
Pleonaste

Holmquistite
Holmquistite



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Holmquistite

Pleonaste and Holmquistite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Vitreous
1.2 Pleochroism
Not Available
Strong in shades of violet when dark-colored.Anthony et al
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004)
Transparent
1.5 Refractive Index
1.7801.622-1.666
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
1.8 Birefringence
Not AvailableNot Available
Achroite
0 0.296
1.9 Clarity
Gemmological Tables (2004)
Transparent

Pleonaste and Holmquistite Optic Character

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

Pleonaste and Holmquistite Transparency

Similar to their colors, Pleonaste and Holmquistite 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, Pleonaste is Gemmological Tables (2004) while Pleonaste is Gemmological Tables (2004) in appearance.