Sodalite and Hematite Optical Properties

Sodalite

Hematite

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1 Optical Properties

1.1 Luster

Greasy

Not Available

1.2 Pleochroism

AbsentWalter Schumann

O = brownish red; E = yellowish red

1.3 Dispersion

0.02NA

0.007 1

1.4 Transparency

Transparent, Translucent, Opaque

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

1.5 Refractive Index

1.478-1.4882.690-3.220

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

cubic

Trigonal

1.8 Birefringence

Not Available0.280

0 0.296

1.9 Clarity

Transparent

OpaqueHerve Nicolas Lazzarelli

Sodalite and Hematite Optic Character

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

Similar to their colors, Sodalite 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, Sodalite is Opaque, Translucent and Transparent while Sodalite is Opaque, Translucent and Transparent in appearance.