Pumpellyite and Imperial Topaz Optical Properties

Pumpellyite

Imperial Topaz

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1 Optical Properties

1.1 Luster

Fibrous

Not Available

1.2 Pleochroism

Not Available

1.3 Dispersion

NA0.01

0.007 1

1.4 Transparency

Gemmological Tables (2004)

Transparent

1.5 Refractive Index

1.674-1.7641.609-1.643

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

Not Available

1.8 Birefringence

0.014-0.016Not Available

0 0.296

1.9 Clarity

OpaqueUlrich Henn and Claudio C. Milisenda

Not Available

Pumpellyite and Imperial Topaz Optic Character

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

Pumpellyite Vs Rutilated Quartz

Pumpellyite Vs Sapphire

Pumpellyite and Imperial Topaz Transparency

Similar to their colors, Pumpellyite and Imperial Topaz 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.