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Sphene
Sphene

Grandidierite
Grandidierite



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Sphene
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Grandidierite

Sphene and Grandidierite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Vitreous, Pearly
1.2 Pleochroism
Not Available
visible
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Not Available
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.84-2.111.578-1.639
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
Orthorhombic
1.8 Birefringence
Not Available0.037-0.039
Achroite
0 0.296
1.9 Clarity
Color grading system
Gemmological Tables (2004) More from other references

Sphene and Grandidierite Optic Character

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

Sphene and Grandidierite Transparency

Similar to their colors, Sphene and Grandidierite 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, Sphene is Not Available while Sphene is Not Available in appearance.