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Apatite
Apatite

Cassiterite
Cassiterite



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Apatite
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Cassiterite

Apatite and Cassiterite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Adamantine, Greasy
1.2 Pleochroism
Blue stones – strong
Pleochroic haloes have been observed. Dichroic in yellow
1.3 Dispersion
0.010.07
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
Transparent, Translucent
1.5 Refractive Index
1.628-1.6511.990-2.105
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Hexagonal
tetragonal
1.8 Birefringence
0.002-0.0080.096-0.098
Achroite
0 0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Apatite and Cassiterite Optic Character

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

Similar to their colors, Apatite and Cassiterite 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.