Californite and Dumortierite Optical Properties

Californite

Dumortierite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Weak; present colour lighter

Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue

1.3 Dispersion

NANone

0.007 1

1.4 Transparency

TranslucentWalter Schumann, Gemstones of the world (2001)

Translucent, Translucent to opaque

1.5 Refractive Index

1.700-1.7251.669-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Orthorhombic

1.8 Birefringence

0.001-0.0120.011-0.037

0 0.296

1.9 Clarity

TranslucentWalter Schumann

Translucent

Californite and Dumortierite Optic Character

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

Similar to their colors, Californite and Dumortierite 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, Californite is Gemstones of the world (2001) and TranslucentWalter Schumann while Californite is Gemstones of the world (2001) and TranslucentWalter Schumann in appearance.