Hardystonite and Franklinite Optical Properties

Hardystonite

Franklinite

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1 Optical Properties

1.1 Luster

Vitreous, Resinous, Greasy

Not Available

1.2 Pleochroism

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Handbook of mineralogy (2001)

Translucent

1.5 Refractive Index

1.672Not Available

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

tetragonal

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

Handbook of mineralogy (2001)

Translucent

Hardystonite and Franklinite Optic Character

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

Similar to their colors, Hardystonite 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, Hardystonite is Handbook of mineralogy (2001) while Hardystonite is Handbook of mineralogy (2001) in appearance.