Shattuckite and Umbalite Optical Properties

Shattuckite

Umbalite

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1 Optical Properties

1.1 Luster

Silky

Not Available

1.2 Pleochroism

X = very pale blue; Y = pale blue; Z = deep blue

Not Available

1.3 Dispersion

NA0.02

0.007 1

1.4 Transparency

Translucent

TransparentGemdat.org, Management Team (2012)

1.5 Refractive Index

1.752-1.8151.730-1.820

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Not Available

1.8 Birefringence

0.063Not Available

0 0.296

1.9 Clarity

Translucent

TransparentGemdat.org

Shattuckite and Umbalite Optic Character

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

Similar to their colors, Shattuckite and Umbalite 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, Shattuckite is Translucent while Shattuckite is Translucent in appearance.