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Staurolite and Apatite Optical Properties


Apatite and Staurolite Optical Properties


Optical Properties

Luster
Resinous   
Vitreous   

Pleochroism
X = colorless; Y = pale yellow; Z = golden yellow   
Blue stones – strong   

Dispersion
Not Available   
0.01   
27

Transparency
Blue Chart Gem Identification (2010) More from other references   
Gemmological Tables (2004) More from other references   

Refractive Index
1.736-1.762   
1.628-1.651   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
Hexagonal   

Birefringence
0.009-0.015   
0.002-0.008   

Clarity
Blue Chart Gem Identification (2010) More from other references   
TransparentUlrich Henn and Claudio C. Milisenda   

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Staurolite and Apatite Optic Character

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

Similar to their colors, Staurolite and Apatite 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.

Brown Gemstones

Brown Gemstones


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