Purpurite and Hematite Optical Properties

Purpurite

Hematite

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1 Optical Properties

1.1 Luster

Not Available

1.2 Pleochroism

StrongArthur Thomas

O = brownish red; E = yellowish red

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

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

OpaqueHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references

1.5 Refractive Index

1.85-1.922.690-3.220

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Trigonal

1.8 Birefringence

0.0700.280

0 0.296

1.9 Clarity

TranslucentWalter Schumann

OpaqueHerve Nicolas Lazzarelli

Purpurite and Hematite Optic Character

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

Similar to their colors, Purpurite and Hematite 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.