Chlorapatite and Franklinite Optical Properties

Chlorapatite

Franklinite

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1 Optical Properties

1.1 Luster

Not Available

1.2 Pleochroism

Weak to moderate; in pale colors.Anthony et al

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent

Translucent

1.5 Refractive Index

1.665-1.667Not Available

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Isometric Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Transparent

Translucent

Chlorapatite and Franklinite Optic Character

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

Similar to their colors, Chlorapatite and Franklinite 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.