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Villiaumite
Villiaumite

Amblygonite
Amblygonite



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Villiaumite
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Amblygonite

Villiaumite and Amblygonite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Vitreous, Pearly
1.2 Pleochroism
Yellow to pink/deep carmineMichael O’Donoghue
weak to none
1.3 Dispersion
NA0.01
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.328-1.3321.578-1.646
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Biaxial/+
1.7 Crystal System
Not Available
Triclinic
1.8 Birefringence
Not Available0.020-0.030
Achroite
0 0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
TransparentUlrich Henn and Claudio C. Milisenda

Villiaumite and Amblygonite Optic Character

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

Villiaumite and Amblygonite Transparency

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