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Pyrophyllite
Pyrophyllite

Hematite
Hematite



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Pyrophyllite
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Hematite

Pyrophyllite and Hematite Optical Properties

Optical Properties

Luster

Pearly
-

Pleochroism

-
O = brownish red; E = yellowish red

Dispersion

0.050.05
0.005 1
👆🏻

Transparency

Translucent
OpaqueHerve Nicolas Lazzarelli

Refractive Index

1.534-1.6012.690-3.220
1 3.25
👆🏻

Optic Character

-
-

Crystal System

-
Trigonal

Birefringence

0.0500.280
0 0.296
👆🏻

Clarity

Translucent
OpaqueHerve Nicolas Lazzarelli

Pyrophyllite and Hematite Optic Character

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

Pyrophyllite and Hematite Transparency

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