Home
Gemstones


Alunite and Erythrite Optical Properties


Erythrite and Alunite Optical Properties


Optical Properties

Luster
Vitreous, Pearly   
Subadamantine, Pearly   

Pleochroism
Not Available   
Visible: X = pale pinkish to pale rose; Y = pale violet to pale violet-rose; Z = deep red   

Dispersion
Not Available   
Not Available   

Transparency
Not Available   
Not Available   

Refractive Index
1.572   
1.626-1.629   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
monoclinic   

Birefringence
0.020   
Not Available   

Clarity
Not Available   
Not Available   

Benefits >>
<< Physical Properties

Alunite and Erythrite Optic Character

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

Compare Red Gemstones

Alunite and Erythrite Transparency

Similar to their colors, Alunite and Erythrite 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, Alunite is Not Available while Alunite is Not Available in appearance.

Red Gemstones

Red Gemstones


Compare Red Gemstones