Mellite and Shattuckite Optical Properties

Mellite

Shattuckite

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1 Optical Properties

1.1 Luster

Vitreous

Silky

1.2 Pleochroism

Weak: yellowish brown yellowAnthony et al

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

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Gemmological Tables (2004) More from other references

Translucent

1.5 Refractive Index

1.509-1.5411.752-1.815

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Orthorhombic

1.8 Birefringence

0.0300.063

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Translucent

Mellite and Shattuckite Optic Character

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

Similar to their colors, Mellite and Shattuckite 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, Mellite is Gemmological Tables (2004) More from other references while Mellite is Gemmological Tables (2004) More from other references in appearance.