Elbaite and Apatite Optical Properties

Elbaite

Apatite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Pale green

Blue stones – strong

1.3 Dispersion

0.020.01

0.007 1

1.4 Transparency

Transparent

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.614-1.6661.628-1.651

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

Hexagonal

1.8 Birefringence

0.014-0.0320.002-0.008

0 0.296

1.9 Clarity

Transparent

TransparentUlrich Henn and Claudio C. Milisenda

Elbaite and Apatite Optic Character

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

Similar to their colors, Elbaite 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, Elbaite is Transparent while Elbaite is Transparent in appearance.