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Malachite
Malachite

Black Opal
Black Opal



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Malachite
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Black Opal

Malachite and Black Opal Optical Properties

1 Optical Properties
1.1 Luster
Adamantine, Vitreous, Silky, Fibrous
Not Available
1.2 Pleochroism
Not Available
AbsentWalter Schumann
1.3 Dispersion
Albite Optical ..
None
Rank: N/A (Overall)
None
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Opaque
Transparent, Translucent
1.5 Refractive Index
1.655-1.909
1.370-1.470
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
Not Available
1.8 Birefringence
0.254
Not Available
1.9 Clarity
Gemmological Tables (2004) More from other references
Transparent

Malachite and Black Opal Optic Character

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

Malachite and Black Opal Transparency

Similar to their colors, Malachite and Black Opal 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, Malachite is Opaque while Malachite is Opaque in appearance.

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