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Euclase and Tantalite Optical Properties


Tantalite and Euclase Optical Properties


Optical Properties

Luster
Vitreous   
Resinous   

Pleochroism
Weak: colorless-(greenish) yellow   
Not Available   

Dispersion
0.02   
23
Not Available   

Transparency
Gemmological Tables (2004) More from other references   
TransparentWalter Schumann, Gemstones of the world (2001) More from other references   

Refractive Index
1.650-1.677   
2.190-2.457   

Optic Character
Not Available   
Not Available   

Crystal System
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a   
Orthorhombic   

Birefringence
0.019-0.025   
0.083   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
TransparentWalter Schumann   

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Euclase and Tantalite Optic Character

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

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

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