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Malachite
Malachite

Aventurine
Aventurine



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Malachite
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Aventurine

Malachite and Aventurine Optical Properties

1 Optical Properties
1.1 Luster
Adamantine, Vitreous, Silky, Fibrous
Vitreous
1.2 Pleochroism
Not Available
AbsentWalter Schumann
1.3 Dispersion
NoneNone
Fluorite Optical Properties
0.007 1
1.4 Transparency
Opaque
Translucent, Opaque . May be translucent when backlit on the edges.
1.5 Refractive Index
1.655-1.9091.544-1.553
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
Trigonal
1.8 Birefringence
0.2540.007-0.010
Achroite
0 0.296
1.9 Clarity
Gemmological Tables (2004) More from other references
Translucent

Malachite and Aventurine Optic Character

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

Similar to their colors, Malachite and Aventurine 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.