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Milarite and Opal Optical Properties


Opal and Milarite Optical Properties


Optical Properties

Luster
Not Available   
Vitreous, Pearly   

Pleochroism
Not Available   
None   

Dispersion
Not Available   
None   

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

Refractive Index
1.529-1.560   
1.37-1.52   

Optic Character
Not Available   
Not Available   

Crystal System
Not Available   
Trigonal   

Birefringence
0.000-0.011   
Not Available   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
Transparent   

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Milarite and Opal Optic Character

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

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

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