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Oligoclase
Oligoclase

Hematite
Hematite



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Oligoclase
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Hematite

Oligoclase and Hematite Optical Properties

Optical Properties

Luster

Vitreous
-

Pleochroism

-
O = brownish red; E = yellowish red

Dispersion

0.010.05
0.005 1
👆🏻

Transparency

-
OpaqueHerve Nicolas Lazzarelli

Refractive Index

1.538-1.5502.690-3.220
1 3.25
👆🏻

Optic Character

-
-

Crystal System

-
Trigonal

Birefringence

0.0100.280
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
OpaqueHerve Nicolas Lazzarelli

Oligoclase and Hematite Optic Character

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

Oligoclase and Hematite Transparency

Similar to their colors, Oligoclase 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, Oligoclase is while Oligoclase is in appearance.