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Apophyllite
Apophyllite

Staurolite
Staurolite



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Apophyllite
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Staurolite

Apophyllite and Staurolite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Pearly
Resinous
1.2 Pleochroism
Dichroic (colorless)
X = colorless; Y = pale yellow; Z = golden yellow
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent
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
Uniaxial/-
Not Available
1.7 Crystal System
tetragonal
monoclinic
1.8 Birefringence
0.000-0.0030.009-0.015
Achroite
0 0.296
1.9 Clarity
Transparent
Blue Chart Gem Identification (2010) More from other references

Apophyllite and Staurolite Optic Character

Apophyllite and Staurolite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Apophyllite 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 Apophyllite 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. Apophyllite has Uniaxial/- character.

Apophyllite and Staurolite Transparency

Similar to their colors, Apophyllite 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, Apophyllite is Translucent and Transparent while Apophyllite is Translucent and Transparent in appearance.