Chrome-Chalcedony and Holmquistite Optical Properties

Chrome-Chalcedony

Holmquistite

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1 Optical Properties

1.1 Luster

Waxy

Vitreous

1.2 Pleochroism

Not Available

Strong in shades of violet when dark-colored.Anthony et al

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Translucent

Transparent

1.5 Refractive Index

1.530-1.5431.622-1.666

1 3.25

1.6 Optic Character

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

0.003-0.009Not Available

0 0.296

1.9 Clarity

Translucent

Transparent

Chrome-Chalcedony and Holmquistite Optic Character

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

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Chrome-Chalcedony and Holmquistite Transparency

Similar to their colors, Chrome-Chalcedony 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, Chrome-Chalcedony is Translucent while Chrome-Chalcedony is Translucent in appearance.