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Riebeckite
Riebeckite

Danburite
Danburite



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Riebeckite
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Danburite

Riebeckite and Danburite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Silky
Vitreous, Greasy
1.2 Pleochroism
X = blue
Weak: pale yellow yellow
1.3 Dispersion
NA0.02
Fluorite Optical Properties
0.007 1
1.4 Transparency
Not Available
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.680-1.6981.627-1.639
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Biaxial/+
1.7 Crystal System
monoclinic
Orthorhombic
1.8 Birefringence
0.005-0.0080.006
Achroite
0 0.296
1.9 Clarity
Not Available
TransparentUlrich Henn and Claudio C. Milisenda

Riebeckite and Danburite Optic Character

Riebeckite and Danburite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Riebeckite and Danburite 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 Riebeckite and Danburite 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. Danburite has Biaxial/+ character.

Riebeckite and Danburite Transparency

Similar to their colors, Riebeckite and Danburite 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, Riebeckite is Not Available while Riebeckite is Not Available in appearance.