Tantalite and Staurolite Optical Properties

Tantalite

Staurolite

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1 Optical Properties

1.1 Luster

Resinous

1.2 Pleochroism

Not Available

X = colorless; Y = pale yellow; Z = golden yellow

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

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

Blue Chart Gem Identification (2010) More from other references

1.5 Refractive Index

2.190-2.4571.736-1.762

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

monoclinic

1.8 Birefringence

0.0830.009-0.015

0 0.296

1.9 Clarity

TransparentWalter Schumann

Blue Chart Gem Identification (2010) More from other references

Tantalite and Staurolite Optic Character

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

Similar to their colors, Tantalite and Staurolite 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, Tantalite is Gemstones of the world (2001) More from other references and TransparentWalter Schumann while Tantalite is Gemstones of the world (2001) More from other references and TransparentWalter Schumann in appearance.