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Hematite and Apophyllite Optical Properties


Apophyllite and Hematite Optical Properties


Optical Properties

Luster
Not Available   
Vitreous, Pearly   

Pleochroism
O = brownish red; E = yellowish red   
Dichroic (colorless)   

Dispersion
Not Available   
Not Available   

Transparency
OpaqueHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references   
Transparent, Translucent   

Refractive Index
2.690-3.220   
1.530-1.543   

Optic Character
Not Available   
Uniaxial/-   

Crystal System
Trigonal   
tetragonal   

Birefringence
0.280   
0.000-0.003   

Clarity
OpaqueHerve Nicolas Lazzarelli   
Transparent   

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Hematite and Apophyllite Optic Character

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

Similar to their colors, Hematite and Apophyllite 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, Hematite is Blue Chart Gem Identification (2010) More from other references and OpaqueHerve Nicolas Lazzarelli while Hematite is Blue Chart Gem Identification (2010) More from other references and OpaqueHerve Nicolas Lazzarelli in appearance.

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