Rosasite and Purpurite Optical Properties

Rosasite

Purpurite

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1 Optical Properties

1.1 Luster

Silky, Vitreous

Not Available

1.2 Pleochroism

Strong: X = pale emerald green or colourless; Y = dark emerald green or pale blue; Z = dark emerald green or pale blue

StrongArthur Thomas

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

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

1.5 Refractive Index

1.672-1.6881.85-1.92

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

Orthorhombic

1.8 Birefringence

0.139-0.1430.070

0 0.296

1.9 Clarity

Not Available

TranslucentWalter Schumann

Rosasite and Purpurite Optic Character

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

Similar to their colors, Rosasite and Purpurite 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, Rosasite is Not Available while Rosasite is Not Available in appearance.