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Petalite
Petalite

Rhodolite
Rhodolite



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Petalite
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Rhodolite

Petalite and Rhodolite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Pearly
Greasy, Vitreous
1.2 Pleochroism
AbsentWalter Schumann
None
1.3 Dispersion
0.01None
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
Gemmological Tables (2004)
1.5 Refractive Index
1.502-1.5231.760
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
cubic
1.8 Birefringence
0.012-0.0160.010-0.014
Achroite
0 0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
TransparentUlrich Henn and Claudio C. Milisenda

Petalite and Rhodolite Optic Character

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

Petalite and Rhodolite Transparency

Similar to their colors, Petalite and Rhodolite 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, Petalite is Gemmological Tables (2004) More from other references while Petalite is Gemmological Tables (2004) More from other references in appearance.