Hematite and Zincite Optical Properties

Hematite

Zincite

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1 Optical Properties

1.1 Luster

Not Available

Subadamantine, Resinous

1.2 Pleochroism

O = brownish red; E = yellowish red

Very weak

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

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

TransparentRobert C. Kammerling, The Journal of Gemmology (1995) More from other references

1.5 Refractive Index

2.690-3.2202.013-2.029

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

Hexagonal

1.8 Birefringence

0.2800.016

0 0.296

1.9 Clarity

OpaqueHerve Nicolas Lazzarelli

TransparentRobert C. Kammerling

Hematite and Zincite Optic Character

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

Similar to their colors, Hematite and Zincite 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, Hematite is Blue Chart Gem Identification (2010) More from other references and OpaqueHerve Nicolas Lazzarelli while Hematite is Blue Chart Gem Identification (2010) More from other references and OpaqueHerve Nicolas Lazzarelli in appearance.