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Holmquistite
Holmquistite

Peridot
Peridot



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Holmquistite and Peridot Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous, Greasy
1.2 Pleochroism
Strong in shades of violet when dark-colored.Anthony et al
Weak: yellow-green green (colorless)Herve Nicolas Lazzarelli
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
0.02
Rank: 18 (Overall)
Fluorite Optical Properties
1.4 Transparency
Transparent
Transparent
1.5 Refractive Index
1.622-1.666
1.64-1.69
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
Orthorhombic
1.8 Birefringence
Not Available
0.036
1.9 Clarity
Transparent
Transparent

Holmquistite and Peridot Optic Character

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

Holmquistite and Peridot Transparency

Similar to their colors, Holmquistite and Peridot 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, Holmquistite is Transparent while Holmquistite is Transparent in appearance.