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Malachite
Malachite

Crocoite
Crocoite



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Malachite
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Crocoite

Malachite and Crocoite Optical Properties

1 Optical Properties
1.1 Luster
Adamantine, Vitreous, Silky, Fibrous
Adamantine
1.2 Pleochroism
Not Available
Distinctly trichroic
1.3 Dispersion
NoneNA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Opaque
Transparent
1.5 Refractive Index
1.655-1.9092.31-2.66
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/n
1.8 Birefringence
0.254Not Available
Achroite
0 0.296
1.9 Clarity
Gemmological Tables (2004) More from other references
Transparent

Malachite and Crocoite Optic Character

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

Similar to their colors, Malachite and Crocoite 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.