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Staurolite
Staurolite

Riebeckite
Riebeckite



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Staurolite
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Riebeckite

Staurolite and Riebeckite Optical Properties

1 Optical Properties
1.1 Luster
Resinous
Vitreous, Silky
1.2 Pleochroism
X = colorless; Y = pale yellow; Z = golden yellow
X = blue
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Blue Chart Gem Identification (2010) More from other references
Not Available
1.5 Refractive Index
1.736-1.7621.680-1.698
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
monoclinic
1.8 Birefringence
0.009-0.0150.005-0.008
Achroite
0 0.296
1.9 Clarity
Blue Chart Gem Identification (2010) More from other references
Not Available

Staurolite and Riebeckite Optic Character

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

Staurolite and Riebeckite Transparency

Similar to their colors, Staurolite and Riebeckite 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, Staurolite is Blue Chart Gem Identification (2010) More from other references while Staurolite is Blue Chart Gem Identification (2010) More from other references in appearance.