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Adularia
Adularia

Danburite
Danburite



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Adularia
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Danburite

Adularia and Danburite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Vitreous, Greasy
1.2 Pleochroism
Not Available
Weak: pale yellow yellow
1.3 Dispersion
NA0.02
Fluorite Optical Properties
0.007 1
1.4 Transparency
TransparentArthur Thomas, Gemstones (2009)
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.518-1.5361.627-1.639
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Biaxial/+
1.7 Crystal System
Not Available
Orthorhombic
1.8 Birefringence
0.005-0.0080.006
Achroite
0 0.296
1.9 Clarity
TransparentArthur Thomas
TransparentUlrich Henn and Claudio C. Milisenda

Adularia and Danburite Optic Character

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

Adularia and Danburite Transparency

Similar to their colors, Adularia 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, Adularia is Gemstones (2009) and TransparentArthur Thomas while Adularia is Gemstones (2009) and TransparentArthur Thomas in appearance.