Powellite and Tourmaline Bi Color Optical Properties

Powellite

Tourmaline Bi Color

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1 Optical Properties

1.1 Luster

Greasy, Subadamantine

Not Available

1.2 Pleochroism

In deeply colored specimens: blue greenAnthony et al

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent

Not Available

1.5 Refractive Index

1.974-1.9841.61-1.66

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Transparent

Not Available

Powellite and Tourmaline Bi Color Optic Character

Powellite and Tourmaline Bi Color optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Powellite and Tourmaline Bi Color 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 Powellite and Tourmaline Bi Color 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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Powellite Vs Rock Crystal

Powellite Vs Sanidine

Powellite Vs Rubellite

Powellite and Tourmaline Bi Color Transparency

Similar to their colors, Powellite and Tourmaline Bi Color 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, Powellite is Transparent while Powellite is Transparent in appearance.