Hardystonite and Spinel Optical Properties

Hardystonite

Spinel

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1 Optical Properties

1.1 Luster

Vitreous, Resinous, Greasy

Vitreous

1.2 Pleochroism

Not Available

Absent

1.3 Dispersion

NA0.02

0.007 1

1.4 Transparency

Handbook of mineralogy (2001)

Transparent, Translucent, Transparent to translucent

1.5 Refractive Index

1.6721.73

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

tetragonal

Isometric

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Handbook of mineralogy (2001)

TransparentUlrich Henn and Claudio C. Milisenda

Hardystonite and Spinel Optic Character

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

Similar to their colors, Hardystonite and Spinel 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.