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Shattuckite
Shattuckite

Opal
Opal



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Shattuckite
X
Opal

Shattuckite and Opal Optical Properties

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Optical Properties

Luster

Silky
Vitreous, Pearly

Pleochroism

X = very pale blue; Y = pale blue; Z = deep blue
None

Dispersion

0.020.01
0.005 1
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Transparency

Translucent
Transparent, Translucent, Transparent to translucent

Refractive Index

1.752-1.8151.37-1.52
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
Trigonal

Birefringence

0.063-9999
0 0.296
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Clarity

Translucent
Transparent

Shattuckite and Opal Optic Character

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

Shattuckite and Opal Transparency

Similar to their colors, Shattuckite and Opal 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.