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Hematite
Hematite

Amblygonite
Amblygonite



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Hematite
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Amblygonite

Hematite and Amblygonite Optical Properties

Optical Properties

Luster

-
Vitreous, Pearly

Pleochroism

O = brownish red; E = yellowish red
weak to none

Dispersion

0.050.01
0.005 1
👆🏻

Transparency

OpaqueHerve Nicolas Lazzarelli
-

Refractive Index

2.690-3.2201.578-1.646
1 3.25
👆🏻

Optic Character

-
Biaxial/+

Crystal System

Trigonal
Triclinic

Birefringence

0.2800.020-0.030
0 0.296
👆🏻

Clarity

OpaqueHerve Nicolas Lazzarelli
TransparentUlrich Henn and Claudio C. Milisenda

Hematite and Amblygonite Optic Character

Hematite and Amblygonite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Hematite and Amblygonite 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 Amblygonite 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. Amblygonite has Biaxial/+ character.

Hematite and Amblygonite Transparency

Similar to their colors, Hematite and Amblygonite 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.