Euclase and Manganotantalite Optical Properties

Euclase

Manganotantalite

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1 Optical Properties

1.1 Luster

Vitreous

Not Available

1.2 Pleochroism

Weak: colorless-(greenish) yellow

Sometimes strongArthur Thomas

1.3 Dispersion

0.02NA

0.007 1

1.4 Transparency

Gemmological Tables (2004) More from other references

TransparentWalter Schumann, Gemstones of the world (2001) More from other references

1.5 Refractive Index

1.650-1.6772.19-2.34

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

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

Not Available

1.8 Birefringence

0.019-0.0250.015

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

TransparentWalter Schumann

Euclase and Manganotantalite Optic Character

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

Similar to their colors, Euclase and Manganotantalite 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.