Purpurite and Cordierite Optical Properties

Purpurite

Cordierite

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1 Optical Properties

1.1 Luster

Not Available

Greasy, Vitreous

1.2 Pleochroism

StrongArthur Thomas

X = pale yellow

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

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

Not Available

1.5 Refractive Index

1.85-1.92Not Available

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

1.8 Birefringence

0.070Not Available

0 0.296

1.9 Clarity

TranslucentWalter Schumann

Not Available

Purpurite and Cordierite Optic Character

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

Similar to their colors, Purpurite and Cordierite 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.