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Holmquistite
Holmquistite

Fayalite
Fayalite



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Holmquistite
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Fayalite

Holmquistite and Fayalite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous, Resinous
1.2 Pleochroism
Strong in shades of violet when dark-colored.Anthony et al
Faint
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
TransparentAnthony et al, Handbook of mineralogy (2001)
1.5 Refractive Index
1.622-1.6661.827-1.879
Agate Opal
1 3.25
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 Available0.042-0.051
Achroite
0 0.296
1.9 Clarity
Transparent
TransparentAnthony et al

Holmquistite and Fayalite Optic Character

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

Similar to their colors, Holmquistite and Fayalite 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.