Shattuckite and Montebrasite Optical Properties

Shattuckite

Montebrasite

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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

NANA

0.007 1

1.4 Transparency

Translucent

TransparentWalter Schumann, Gemstones of the world (2001) More from other references

1.5 Refractive Index

1.752-1.8151.578-1.646

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Not Available

1.8 Birefringence

0.0630.020-0.030

0 0.296

1.9 Clarity

Translucent

TransparentWalter Schumann

Shattuckite and Montebrasite Optic Character

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

Similar to their colors, Shattuckite and Montebrasite 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.