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Hematite
Hematite

Dumortierite
Dumortierite



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Hematite
X
Dumortierite

Hematite and Dumortierite Optical Properties

Optical Properties

Luster

-
Vitreous

Pleochroism

O = brownish red; E = yellowish red
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue

Dispersion

0.050.01
0.005 1
👆🏻

Transparency

OpaqueHerve Nicolas Lazzarelli
Translucent, Translucent to opaque

Refractive Index

2.690-3.2201.669-1.723
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Trigonal
Orthorhombic

Birefringence

0.2800.011-0.037
0 0.296
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Clarity

OpaqueHerve Nicolas Lazzarelli
Translucent

Hematite and Dumortierite Optic Character

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

Hematite and Dumortierite Transparency

Similar to their colors, Hematite and Dumortierite 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 OpaqueHerve Nicolas Lazzarelli while Hematite is OpaqueHerve Nicolas Lazzarelli in appearance.