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Dumortierite
Dumortierite

Rhodolite
Rhodolite



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Dumortierite
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Rhodolite

Dumortierite and Rhodolite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Greasy, Vitreous
1.2 Pleochroism
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue
None
1.3 Dispersion
NoneNone
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent, Translucent to opaque
Gemmological Tables (2004)
1.5 Refractive Index
1.669-1.7231.760
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
cubic
1.8 Birefringence
0.011-0.0370.010-0.014
Achroite
0 0.296
1.9 Clarity
Translucent
TransparentUlrich Henn and Claudio C. Milisenda

Dumortierite and Rhodolite Optic Character

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

Dumortierite and Rhodolite Transparency

Similar to their colors, Dumortierite 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, Dumortierite is Translucent and Translucent to opaque while Dumortierite is Translucent and Translucent to opaque in appearance.