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Calcite
Calcite

Holmquistite
Holmquistite



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Calcite
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Holmquistite

Calcite and Holmquistite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Pearly
Vitreous
1.2 Pleochroism
NilArthur Thomas
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, Translucent
Transparent
1.5 Refractive Index
1.486-1.6581.622-1.666
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
1.8 Birefringence
0.154-0.174Not Available
Achroite
0 0.296
1.9 Clarity
Transparent
Transparent

Calcite and Holmquistite Optic Character

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

Calcite and Holmquistite Transparency

Similar to their colors, Calcite 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, Calcite is Transparent and Translucent while Calcite is Transparent and Translucent in appearance.