Chlorapatite and Holmquistite Optical Properties

Chlorapatite

Holmquistite

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1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

Weak to moderate; in pale colors.Anthony et al

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

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent

1.5 Refractive Index

1.665-1.6671.622-1.666

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

Not AvailableNot Available

0 0.296

1.9 Clarity

Transparent

Chlorapatite and Holmquistite Optic Character

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

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