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Malachite
Malachite

Tanzanite
Tanzanite



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Malachite
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Tanzanite

Malachite and Tanzanite Optical Properties

1 Optical Properties
1.1 Luster
Adamantine, Vitreous, Silky, Fibrous
Vitreous
1.2 Pleochroism
Not Available
Present
1.3 Dispersion
None0.03
Fluorite Optical Properties
0.007 1
1.4 Transparency
Opaque
Transparent, Translucent, Transparent to translucent
1.5 Refractive Index
1.655-1.9091.685-1.707
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
Orthorhombic
1.8 Birefringence
0.2540.006-0.018
Achroite
0 0.296
1.9 Clarity
Gemmological Tables (2004) More from other references
TransparentUlrich Henn and Claudio C. Milisenda

Malachite and Tanzanite Optic Character

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

Similar to their colors, Malachite and Tanzanite 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.