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Prehnite
Prehnite

Cobaltite
Cobaltite



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Prehnite
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Cobaltite

Prehnite and Cobaltite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Not Available
1.2 Pleochroism
AbsentWalter Schumann
Very weak
1.3 Dispersion
NoneNA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent
Gems
1.5 Refractive Index
1.611-1.673Not Available
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: P ca21
1.8 Birefringence
0.021-0.033Not Available
Achroite
0 0.296
1.9 Clarity
TranslucentHerve Nicolas Lazzarelli
Gems

Prehnite and Cobaltite Optic Character

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

Prehnite and Cobaltite Transparency

Similar to their colors, Prehnite and Cobaltite 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, Prehnite is Translucent while Prehnite is Translucent in appearance.