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Apatite
Apatite

Crocoite
Crocoite



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Apatite
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Crocoite

Apatite and Crocoite Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous
Adamantine
1.2 Pleochroism
Blue stones – strong
Distinctly trichroic
1.3 Dispersion
0.01NA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
Transparent
1.5 Refractive Index
1.628-1.6512.31-2.66
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Hexagonal
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/n
1.8 Birefringence
0.002-0.008Not Available
Achroite
0 0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Apatite and Crocoite Optic Character

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

Apatite and Crocoite Transparency

Similar to their colors, Apatite and Crocoite 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.