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Mottramite
Mottramite

Apatite
Apatite



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Mottramite
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Apatite

Mottramite and Apatite Optical Properties

Optical Properties

Luster

Greasy
Vitreous

Pleochroism

Visible X=Y= canary yellow to greenish yellow
Blue stones – strong

Dispersion

0.040.01
0.005 1
👆🏻

Transparency

-
-

Refractive Index

2.1701.628-1.651
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
Hexagonal

Birefringence

0.1500.002-0.008
0 0.296
👆🏻

Clarity

-
TransparentUlrich Henn and Claudio C. Milisenda

Mottramite and Apatite Optic Character

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

Mottramite and Apatite Transparency

Similar to their colors, Mottramite 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, Mottramite is while Mottramite is in appearance.