Diamond and Polyhalite Optical Properties

Diamond

Polyhalite

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1 Optical Properties

1.1 Luster

Adamantine

Vitreous, Resinous

1.2 Pleochroism

None

Not Available

1.3 Dispersion

0.04NA

0.007 1

1.4 Transparency

Transparent, Translucent, Transparent to opaque

Not Available

1.5 Refractive Index

2.417-2.4191.546-1.548

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

cubic

Triclinic

1.8 Birefringence

Not Available0.021

0 0.296

1.9 Clarity

Transparent

Not Available

Diamond and Polyhalite Optic Character

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

Similar to their colors, Diamond and Polyhalite 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, Diamond is Translucent, Transparent and Transparent to opaque while Diamond is Translucent, Transparent and Transparent to opaque in appearance.