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Thaumasite and Dallasite Optical Properties


Dallasite and Thaumasite Optical Properties


Optical Properties

Luster
Vitreous, Silky   
Not Available   

Pleochroism
Not Available   
Not Available   

Dispersion
Not Available   
Not Available   

Transparency
Gemmological Tables (2004) More from other references   
Not Available   

Refractive Index
1.467-1.505   
1.540   

Optic Character
Not Available   
Not Available   

Crystal System
Hexagonal   
Not Available   

Birefringence
0.038   
0.008-0.010   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
Not Available   

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Thaumasite and Dallasite Optic Character

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

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Thaumasite and Dallasite Transparency

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

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