Allanite and Californite Optical Properties

Allanite

Californite

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1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

Not Available

Weak; present colour lighter

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

TranslucentWalter Schumann, Gemstones of the world (2001)

1.5 Refractive Index

11.700-1.725

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

1.8 Birefringence

0.013-0.0360.001-0.012

0 0.296

1.9 Clarity

Not Available

TranslucentWalter Schumann

Allanite and Californite Optic Character

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

Similar to their colors, Allanite and Californite 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, Allanite is Not Available while Allanite is Not Available in appearance.