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Friedelite
Friedelite

Dioptase
Dioptase



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Friedelite
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Dioptase

Friedelite and Dioptase Optical Properties

Optical Properties

Luster

-
Vitreous

Pleochroism

-
Weak; dark emerald green

Dispersion

0.040.04
0.005 1
👆🏻

Transparency

Translucent
TranslucentHerve Nicolas Lazzarelli

Refractive Index

1.627-1.6631.644-1.720
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/m
Trigonal

Birefringence

0.032-0.0350.051-0.053
0 0.296
👆🏻

Clarity

Translucent
TranslucentHerve Nicolas Lazzarelli

Friedelite and Dioptase Optic Character

Friedelite and Dioptase optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Friedelite and Dioptase 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 Friedelite and Dioptase 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.

Friedelite and Dioptase Transparency

Similar to their colors, Friedelite and Dioptase 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, Friedelite is Translucent while Friedelite is Translucent in appearance.