Andradite Garnet and Purpurite Optical Properties

Andradite Garnet

Purpurite

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1 Optical Properties

1.1 Luster

Adamantine

Not Available

1.2 Pleochroism

Not Available

StrongArthur Thomas

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent, Opaque, Transparent to opaque

TranslucentWalter Schumann, Gemstones of the world (2001) More from other references

1.5 Refractive Index

1.888-1.8891.85-1.92

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Isometric

Orthorhombic

1.8 Birefringence

Not Available0.070

0 0.296

1.9 Clarity

Transparent to opaque

TranslucentWalter Schumann

Andradite Garnet and Purpurite Optic Character

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

Similar to their colors, Andradite Garnet and Purpurite 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, Andradite Garnet is Opaque, Transparent and Transparent to opaque while Andradite Garnet is Opaque, Transparent and Transparent to opaque in appearance.