Apatite and Jet Optical Properties

Apatite

Jet

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1 Optical Properties

1.1 Luster

Vitreous

Waxy

1.2 Pleochroism

Blue stones – strong

AbsentWalter Schumann

1.3 Dispersion

0.01None

0.007 1

1.4 Transparency

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.628-1.6511.640-1.680

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Hexagonal

Amorphous

1.8 Birefringence

0.002-0.008Not Available

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Gemmological Tables (2004) More from other references

Apatite and Jet Optic Character

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

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