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Unakite and Poudretteite Optical Properties


Poudretteite and Unakite Optical Properties


Optical Properties

Luster
Not Available   
Vitreous   

Pleochroism
Not Available   
Colorless   

Dispersion
Not Available   
Not Available   

Transparency
Gemstones of the world (2001)   
Gemmological Tables (2004) More from other references   

Refractive Index
1.525   
1.511-1.532   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
Hexagonal   

Birefringence
Not Available   
0.021   

Clarity
Gemstones of the world (2001)   
TransparentUlrich Henn and Claudio C. Milisenda   

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Unakite and Poudretteite Optic Character

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

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Unakite and Poudretteite Transparency

Similar to their colors, Unakite and Poudretteite 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, Unakite is Gemstones of the world (2001) while Unakite is Gemstones of the world (2001) in appearance.

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