Antigorite and Hematite Optical Properties

Antigorite

Hematite

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1 Optical Properties

1.1 Luster

Waxy, Silky, Resinous, Greasy

Not Available

1.2 Pleochroism

pale greenish yellow.

O = brownish red; E = yellowish red

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Translucent

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

1.5 Refractive Index

1.530-1.5752.690-3.220

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Monoclinic Domatic H-M Symbol (m) Space Group: Cm

Trigonal

1.8 Birefringence

Not Available0.280

0 0.296

1.9 Clarity

Translucent

OpaqueHerve Nicolas Lazzarelli

Antigorite and Hematite Optic Character

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

Similar to their colors, Antigorite 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, Antigorite is Translucent while Antigorite is Translucent in appearance.