Sardonyx and Bertrandite Optical Properties

Sardonyx

Bertrandite

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1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

Not Available

none.

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Translucent

TransparentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

1.530-1.5431.583-1.614

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: Ccm21

1.8 Birefringence

0.008-0.010Not Available

0 0.296

1.9 Clarity

Translucent

TransparentAnthony et al

Sardonyx and Bertrandite Optic Character

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

Similar to their colors, Sardonyx and Bertrandite 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, Sardonyx is Translucent while Sardonyx is Translucent in appearance.