Scheelite and Hematite Optical Properties

Scheelite

Hematite

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1 Optical Properties

1.1 Luster

Vitreous, Adamantine

Not Available

1.2 Pleochroism

Definite dichoric in yellow (yellow to orange-brown)

O = brownish red; E = yellowish red

1.3 Dispersion

0.04NA

0.007 1

1.4 Transparency

Translucent, Transparent

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

1.5 Refractive Index

1.918-1.9362.690-3.220

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

tetragonal

Trigonal

1.8 Birefringence

0.0160.280

0 0.296

1.9 Clarity

Translucent

OpaqueHerve Nicolas Lazzarelli

Scheelite and Hematite Optic Character

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

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