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Afghanite and Brookite Optical Properties


Brookite and Afghanite Optical Properties


Optical Properties

Luster
Vitreous   
Adamantine   

Pleochroism
Not Available   
Very weak   

Dispersion
Not Available   
Not Available   

Transparency
Transparent, Gemstones (2009)   
Gemmological Tables (2004) More from other references   

Refractive Index
1.523   
2.583-2.741   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Orthorhombic   

Birefringence
0.006   
0.117   

Clarity
Transparent   
Gemmological Tables (2004) More from other references   

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<< Physical Properties

Afghanite and Brookite Optic Character

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

Similar to their colors, Afghanite and Brookite 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, Afghanite is Gemstones (2009) and Transparent while Afghanite is Gemstones (2009) and Transparent in appearance.

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