Nepheline and Boulder Opal Optical Properties

Nepheline

Boulder Opal

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1 Optical Properties

1.1 Luster

Vitreous, Greasy

Not Available

1.2 Pleochroism

Not Available

AbsentWalter Schumann

1.3 Dispersion

NANone

0.007 1

1.4 Transparency

Transparent, Translucent

1.5 Refractive Index

1.529-1.5471.370-1.470

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Hexagonal

Not Available

1.8 Birefringence

0.003-0.004Not Available

0 0.296

1.9 Clarity

Transparent

Nepheline and Boulder Opal Optic Character

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

Similar to their colors, Nepheline 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, Nepheline is Translucent and Transparent while Nepheline is Translucent and Transparent in appearance.