Rhodochrosite and Mellite Optical Properties

Rhodochrosite

Mellite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Weak

Weak: yellowish brown yellowAnthony et al

1.3 Dispersion

0.02NA

0.007 1

1.4 Transparency

Transparent, Opaque, Transparent to nearly opaque

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.601.509-1.541

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

Not Available

1.8 Birefringence

0.208-0.2200.030

0 0.296

1.9 Clarity

Transparent to nearly opaque

TransparentUlrich Henn and Claudio C. Milisenda

Rhodochrosite and Mellite Optic Character

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

Similar to their colors, Rhodochrosite and Mellite 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, Rhodochrosite is Opaque, Transparent and Transparent to nearly opaque while Rhodochrosite is Opaque, Transparent and Transparent to nearly opaque in appearance.