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Nickeline
Nickeline

Black Opal
Black Opal



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Nickeline
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Black Opal

Nickeline and Black Opal Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Not Available
1.2 Pleochroism
Strong (reflected light)
AbsentWalter Schumann
1.3 Dispersion
NANone
Fluorite Optical Properties
0.007 1
1.4 Transparency
Not Available
Transparent, Translucent
1.5 Refractive Index
Not Available1.370-1.470
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Hexagonal
Not Available
1.8 Birefringence
Not AvailableNot Available
Achroite
0 0.296
1.9 Clarity
Not Available
Transparent

Nickeline and Black Opal Optic Character

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

Nickeline and Black Opal Transparency

Similar to their colors, Nickeline and Black 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, Nickeline is Not Available while Nickeline is Not Available in appearance.