Alunite and Apache Tear Optical Properties

Alunite

Apache Tear

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1 Optical Properties

1.1 Luster

Vitreous, Pearly

Not Available

1.2 Pleochroism

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

1.5 Refractive Index

1.572Not Available

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

Amorphous

1.8 Birefringence

0.020Not Available

0 0.296

1.9 Clarity

Not Available

Alunite and Apache Tear Optic Character

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

Similar to their colors, Alunite and Apache Tear 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, Alunite is Not Available while Alunite is Not Available in appearance.