Sunstone and Apophyllite Optical Properties

Sunstone

Apophyllite

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1 Optical Properties

1.1 Luster

Vitreous

Vitreous, Pearly

1.2 Pleochroism

Weak or absentWalter Schumann

Dichroic (colorless)

1.3 Dispersion

NoneNA

0.007 1

1.4 Transparency

Transparent, Translucent, Transparent to translucent

Transparent, Translucent

1.5 Refractive Index

1.53-1.551.530-1.543

1 3.25

1.6 Optic Character

Not Available

Uniaxial/-

1.7 Crystal System

Triclinic

tetragonal

1.8 Birefringence

0.007-0.0100.000-0.003

0 0.296

1.9 Clarity

Transparent to translucent

Transparent

Sunstone and Apophyllite Optic Character

Sunstone and Apophyllite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Sunstone and Apophyllite 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 Apophyllite 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. Apophyllite has Uniaxial/- character.

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Sunstone and Apophyllite Transparency

Similar to their colors, Sunstone and Apophyllite 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.