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Apophyllite and Hureaulite Optical Properties


Hureaulite and Apophyllite Optical Properties


Optical Properties

Luster
Vitreous, Pearly   
Vitreous, Greasy   

Pleochroism
Dichroic (colorless)   
Colorless yellow to pale rose reddish yellow to reddish brown.Anthony et al   

Dispersion
Not Available   
Not Available   

Transparency
Transparent, Translucent   
Transparent   

Refractive Index
1.530-1.543   
1.647-1.667   

Optic Character
Uniaxial/-   
Not Available   

Crystal System
tetragonal   
Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/c   

Birefringence
0.000-0.003   
0.012   

Clarity
Transparent   
Transparent   

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Apophyllite and Hureaulite Optic Character

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

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Apophyllite and Hureaulite Transparency

Similar to their colors, Apophyllite and Hureaulite 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.

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