Sard and Hematite Optical Properties

Sard

Hematite

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1 Optical Properties

1.1 Luster

Waxy

Not Available

1.2 Pleochroism

AbsentWalter Schumann

O = brownish red; E = yellowish red

1.3 Dispersion

NoneNA

0.007 1

1.4 Transparency

Translucent

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

1.5 Refractive Index

1.535-1.5392.690-3.220

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Trigonal

1.8 Birefringence

0.008-0.0100.280

0 0.296

1.9 Clarity

Translucent

OpaqueHerve Nicolas Lazzarelli

Sard and Hematite Optic Character

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

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