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Powellite
Powellite

Danburite
Danburite



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Danburite

Powellite and Danburite Optical Properties

1 Optical Properties
1.1 Luster
Greasy, Subadamantine
Vitreous, Greasy
1.2 Pleochroism
In deeply colored specimens: blue greenAnthony et al
Weak: pale yellow yellow
1.3 Dispersion
NA0.02
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.974-1.9841.627-1.639
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Biaxial/+
1.7 Crystal System
Not Available
Orthorhombic
1.8 Birefringence
Not Available0.006
Achroite
0 0.296
1.9 Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Powellite and Danburite Optic Character

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

Powellite and Danburite Transparency

Similar to their colors, Powellite 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, Powellite is Transparent while Powellite is Transparent in appearance.