Apache Tear and Thulite Optical Properties

Apache Tear

Thulite

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1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

Not Available

Present

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

Opaque, Translucent, Opaque . May be translucent in thin backlit sections.

1.5 Refractive Index

Not Available1.695

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Amorphous

Orthorhombic

1.8 Birefringence

Not Available0.006-0.018

0 0.296

1.9 Clarity

Not Available

OpaqueHerve Nicolas Lazzarelli

Apache Tear and Thulite Optic Character

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

Similar to their colors, Apache Tear and Thulite 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.