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Chalcedony
Chalcedony

Staurolite
Staurolite



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Chalcedony
X
Staurolite

Chalcedony and Staurolite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Resinous
1.2 Pleochroism
AbsentWalter Schumann
X = colorless; Y = pale yellow; Z = golden yellow
1.3 Dispersion
NoneNA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent, Translucent to opaque
Blue Chart Gem Identification (2010) More from other references
1.5 Refractive Index
1.530-1.5431.736-1.762
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
monoclinic
1.8 Birefringence
0.003-0.0090.009-0.015
Achroite
0 0.296
1.9 Clarity
Translucent
Blue Chart Gem Identification (2010) More from other references

Chalcedony and Staurolite Optic Character

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

Chalcedony and Staurolite Transparency

Similar to their colors, Chalcedony 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, Chalcedony is Translucent and Translucent to opaque while Chalcedony is Translucent and Translucent to opaque in appearance.