Hardystonite and Andradite Garnet Optical Properties

Hardystonite

Andradite Garnet

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1 Optical Properties

1.1 Luster

Vitreous, Resinous, Greasy

Adamantine

1.2 Pleochroism

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Handbook of mineralogy (2001)

Transparent, Opaque, Transparent to opaque

1.5 Refractive Index

1.6721.888-1.889

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

tetragonal

Isometric

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Handbook of mineralogy (2001)

Transparent to opaque

Hardystonite and Andradite Garnet Optic Character

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

Similar to their colors, Hardystonite and Andradite Garnet 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, Hardystonite is Handbook of mineralogy (2001) while Hardystonite is Handbook of mineralogy (2001) in appearance.