Norbergite and Apatite Optical Properties

Norbergite

Apatite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Pale yellow very pale yellow colorlessAnthony et al

Blue stones – strong

1.3 Dispersion

NA0.01

0.007 1

1.4 Transparency

Transparent

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.563-1.5931.628-1.651

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Hexagonal

1.8 Birefringence

Not Available0.002-0.008

0 0.296

1.9 Clarity

Transparent

TransparentUlrich Henn and Claudio C. Milisenda

Norbergite and Apatite Optic Character

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

Similar to their colors, Norbergite and Apatite 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, Norbergite is Transparent while Norbergite is Transparent in appearance.