Purpurite and Crocoite Optical Properties

Purpurite

Crocoite

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1 Optical Properties

1.1 Luster

Not Available

Adamantine

1.2 Pleochroism

StrongArthur Thomas

Distinctly trichroic

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

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

Transparent

1.5 Refractive Index

1.85-1.922.31-2.66

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/n

1.8 Birefringence

0.070Not Available

0 0.296

1.9 Clarity

TranslucentWalter Schumann

Transparent

Purpurite and Crocoite Optic Character

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

Similar to their colors, Purpurite and Crocoite 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, Purpurite is Gemstones of the world (2001) More from other references and TranslucentWalter Schumann while Purpurite is Gemstones of the world (2001) More from other references and TranslucentWalter Schumann in appearance.