Povondraite and Staurolite Optical Properties

Povondraite

Staurolite

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1 Optical Properties

1.1 Luster

Resinous

1.2 Pleochroism

Strong: yellow-brown

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

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Translucent

Blue Chart Gem Identification (2010) More from other references

1.5 Refractive Index

Not Available1.736-1.762

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

monoclinic

1.8 Birefringence

Not Available0.009-0.015

0 0.296

1.9 Clarity

Translucent

Blue Chart Gem Identification (2010) More from other references

Povondraite and Staurolite Optic Character

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

Similar to their colors, Povondraite 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, Povondraite is Translucent while Povondraite is Translucent in appearance.