Gahnospinel and Staurolite Optical Properties

Gahnospinel

Staurolite

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1 Optical Properties

1.1 Luster

Vitreous

Resinous

1.2 Pleochroism

AbsentWalter Schumann

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

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Gemmological Tables (2004)

Blue Chart Gem Identification (2010) More from other references

1.5 Refractive Index

1.735-1.7901.736-1.762

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Isometric

monoclinic

1.8 Birefringence

Not Available0.009-0.015

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Blue Chart Gem Identification (2010) More from other references

Gahnospinel and Staurolite Optic Character

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

Similar to their colors, Gahnospinel 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, Gahnospinel is Gemmological Tables (2004) while Gahnospinel is Gemmological Tables (2004) in appearance.