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Howlite and Dioptase Optical Properties


Dioptase and Howlite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
NilArthur Thomas   
Weak; dark emerald green   

Dispersion
Not Available   
0.04   
13

Transparency
Gemmological Tables (2004) More from other references   
TranslucentHerve Nicolas Lazzarelli   

Refractive Index
1.583-1.608   
1.644-1.720   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
Trigonal   

Birefringence
0.019   
0.051-0.053   

Clarity
Gemmological Tables (2004) More from other references   
TranslucentHerve Nicolas Lazzarelli   

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Howlite and Dioptase Optic Character

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

Similar to their colors, Howlite and Dioptase 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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