Hardystonite and Dioptase Optical Properties

Hardystonite

Dioptase

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1 Optical Properties

1.1 Luster

Vitreous, Resinous, Greasy

Vitreous

1.2 Pleochroism

Not Available

Weak; dark emerald green

1.3 Dispersion

NA0.04

0.007 1

1.4 Transparency

Handbook of mineralogy (2001)

TranslucentHerve Nicolas Lazzarelli

1.5 Refractive Index

1.6721.644-1.720

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

tetragonal

Trigonal

1.8 Birefringence

Not Available0.051-0.053

0 0.296

1.9 Clarity

Handbook of mineralogy (2001)

TranslucentHerve Nicolas Lazzarelli

Hardystonite and Dioptase Optic Character

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

Similar to their colors, Hardystonite and Dioptase 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.