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Howlite and Andradite Optical Properties


Andradite and Howlite Optical Properties


Optical Properties

Luster
Vitreous   
Adamantine, Resinous   

Pleochroism
NilArthur Thomas   
Not Available   

Dispersion
Not Available   
0.06   
7

Transparency
Gemmological Tables (2004) More from other references   
Transparent   

Refractive Index
1.583-1.608   
1.88-1.94   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
cubic   

Birefringence
0.019   
0.057   

Clarity
Gemmological Tables (2004) More from other references   
Transparent   

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Howlite and Andradite Optic Character

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

Similar to their colors, Howlite and Andradite 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, Howlite is Gemmological Tables (2004) More from other references while Howlite is Gemmological Tables (2004) More from other references in appearance.

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