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Sanidine
Sanidine

Holmquistite
Holmquistite



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Sanidine
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Holmquistite

Sanidine and Holmquistite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Vitreous
1.2 Pleochroism
WeakMichael O’Donoghue
Strong in shades of violet when dark-colored.Anthony et al
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Transparent
1.5 Refractive Index
1.518-1.5361.622-1.666
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
0.005-0.008Not Available
Achroite
0 0.296
1.9 Clarity
Transparent
Transparent

Sanidine and Holmquistite Optic Character

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

Sanidine and Holmquistite Transparency

Similar to their colors, Sanidine 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, Sanidine is Transparent while Sanidine is Transparent in appearance.