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Wavellite and Howlite Optical Properties


Howlite and Wavellite Optical Properties


Optical Properties

Luster
Vitreous, Resinous, Pearly   
Vitreous   

Pleochroism
Weak   
NilArthur Thomas   

Dispersion
Not Available   
Not Available   

Transparency
Gems   
Gemmological Tables (2004) More from other references   

Refractive Index
1.518-1.561   
1.583-1.608   

Optic Character
Not Available   
Not Available   

Crystal System
Orthorhombic   
monoclinic   

Birefringence
0.025   
0.019   

Clarity
Gems   
Gemmological Tables (2004) More from other references   

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Wavellite and Howlite Optic Character

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

Similar to their colors, Wavellite and Howlite 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, Wavellite is Gems while Wavellite is Gems in appearance.

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