Beryllonite and Hematite Optical Properties

Beryllonite

Hematite

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1 Optical Properties

1.1 Luster

Vitreous, Adamantine, Pearly

Not Available

1.2 Pleochroism

AbsentWalter Schumann

O = brownish red; E = yellowish red

1.3 Dispersion

0.01NA

0.007 1

1.4 Transparency

Gemmological Tables (2004) More from other references

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

1.5 Refractive Index

1.552-1.5622.690-3.220

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

Trigonal

1.8 Birefringence

0.0090.280

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

OpaqueHerve Nicolas Lazzarelli

Beryllonite and Hematite Optic Character

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

Similar to their colors, Beryllonite 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, Beryllonite is Gemmological Tables (2004) More from other references while Beryllonite is Gemmological Tables (2004) More from other references in appearance.