Apache Tear and Nepheline Optical Properties

Apache Tear

Nepheline

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1 Optical Properties

1.1 Luster

Not Available

Vitreous, Greasy

1.2 Pleochroism

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

Transparent, Translucent

1.5 Refractive Index

Not Available1.529-1.547

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Amorphous

Hexagonal

1.8 Birefringence

Not Available0.003-0.004

0 0.296

1.9 Clarity

Not Available

Transparent

Apache Tear and Nepheline Optic Character

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

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