Pumpellyite and Rosasite Optical Properties

Pumpellyite

Rosasite

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1 Optical Properties

1.1 Luster

Fibrous

Silky, Vitreous

1.2 Pleochroism

Not Available

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

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Gemmological Tables (2004)

Not Available

1.5 Refractive Index

1.674-1.7641.672-1.688

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

1.8 Birefringence

0.014-0.0160.139-0.143

0 0.296

1.9 Clarity

OpaqueUlrich Henn and Claudio C. Milisenda

Not Available

Pumpellyite and Rosasite Optic Character

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

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Pumpellyite Vs Rutilated Quartz

Pumpellyite and Rosasite Transparency

Similar to their colors, Pumpellyite and Rosasite 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, Pumpellyite is Gemmological Tables (2004) while Pumpellyite is Gemmological Tables (2004) in appearance.