Peridot and Staurolite Optical Properties

Peridot

Staurolite

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1 Optical Properties

1.1 Luster

Vitreous, Greasy

Resinous

1.2 Pleochroism

Weak: yellow-green green (colorless)Herve Nicolas Lazzarelli

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

1.3 Dispersion

0.02NA

0.007 1

1.4 Transparency

Transparent

Blue Chart Gem Identification (2010) More from other references

1.5 Refractive Index

1.64-1.691.736-1.762

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

monoclinic

1.8 Birefringence

0.0360.009-0.015

0 0.296

1.9 Clarity

Transparent

Blue Chart Gem Identification (2010) More from other references

Peridot and Staurolite Optic Character

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

Similar to their colors, Peridot 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, Peridot is Transparent while Peridot is Transparent in appearance.