Sunstone and Dioptase Optical Properties

Sunstone

Dioptase

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Weak or absentWalter Schumann

Weak; dark emerald green

1.3 Dispersion

None0.04

0.007 1

1.4 Transparency

Transparent, Translucent, Transparent to translucent

TranslucentHerve Nicolas Lazzarelli

1.5 Refractive Index

1.53-1.551.644-1.720

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Triclinic

Trigonal

1.8 Birefringence

0.007-0.0100.051-0.053

0 0.296

1.9 Clarity

Transparent to translucent

TranslucentHerve Nicolas Lazzarelli

Sunstone and Dioptase Optic Character

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

Similar to their colors, Sunstone 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, Sunstone is Translucent, Transparent and Transparent to translucent while Sunstone is Translucent, Transparent and Transparent to translucent in appearance.