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Howlite and Boulder Opal Optical Properties


Boulder Opal and Howlite Optical Properties


Optical Properties

Luster
Vitreous   
Not Available   

Pleochroism
NilArthur Thomas   
AbsentWalter Schumann   

Dispersion
Not Available   
None   

Transparency
Gemmological Tables (2004) More from other references   
Transparent, Translucent   

Refractive Index
1.583-1.608   
1.370-1.470   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
Not Available   

Birefringence
0.019   
Not Available   

Clarity
Gemmological Tables (2004) More from other references   
Transparent   

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Howlite and Boulder Opal Optic Character

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

Similar to their colors, Howlite and Boulder Opal 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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