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Manganotantalite
Manganotantalite

Petalite
Petalite



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Manganotantalite
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Petalite

Manganotantalite and Petalite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Vitreous, Pearly
1.2 Pleochroism
Sometimes strongArthur Thomas
AbsentWalter Schumann
1.3 Dispersion
NA0.01
Fluorite Optical Properties
0.007 1
2.5 Transparency
TransparentWalter Schumann, Gemstones of the world (2001) More from other references
Gemmological Tables (2004) More from other references
2.6 Refractive Index
2.19-2.341.502-1.523
Agate Opal
1 3.25
2.7 Optic Character
Not Available
Not Available
2.10 Crystal System
Not Available
monoclinic
2.12 Birefringence
0.0150.012-0.016
Achroite
0 0.296
3.4 Clarity
TransparentWalter Schumann
TransparentUlrich Henn and Claudio C. Milisenda

Manganotantalite and Petalite Optic Character

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

Manganotantalite and Petalite Transparency

Similar to their colors, Manganotantalite and Petalite 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, Manganotantalite is Gemstones of the world (2001) More from other references and TransparentWalter Schumann while Manganotantalite is Gemstones of the world (2001) More from other references and TransparentWalter Schumann in appearance.