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Apache Tear
Apache Tear

Covellite
Covellite



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Apache Tear
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Covellite

Apache Tear and Covellite Optical Properties

Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
-
-
0.01
-
-9999
-
-
-9999
-
 
Resinous
Marked
0.08
OpaqueAnthony et al
1.45-2.62
-
Hexagonal
-9999
OpaqueAnthony et al

Apache Tear and Covellite Optic Character

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

Apache Tear and Covellite Transparency

Similar to their colors, Apache Tear and Covellite 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 while Apache Tear is in appearance.