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Coral
Coral

Dioptase
Dioptase



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Coral
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Dioptase

Coral and Dioptase Optical Properties

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1 Optical Properties
1.1 Luster
Not Available
Vitreous
1.2 Pleochroism
AbsentWalter Schumann
Weak; dark emerald green
1.3 Dispersion
None0.04
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent
TranslucentHerve Nicolas Lazzarelli
1.5 Refractive Index
1.486-1.6581.644-1.720
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
Trigonal
1.8 Birefringence
0.160-0.1720.051-0.053
Achroite
0 0.296
1.9 Clarity
Translucent
TranslucentHerve Nicolas Lazzarelli

Coral and Dioptase Optic Character

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

Coral and Dioptase Transparency

Similar to their colors, Coral 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, Coral is Translucent while Coral is Translucent in appearance.