Information
Specific Gravity: 4.05 ( -0.12 / +0.25 )
Hardness: 7.0 - 7.5
Refractive Index: 1.790 ( -0.030 / +0.030 )
Birefringence: 0.013
Crystal System: Isometric
Luster: Vitreous
Chemical Composition: Fe₃Al₂(SiO₄)₃
Optical Character: Isotropic
Pleochroism: None
Transparency: Transparent, Translucent
Color: Orange, Pink, Red, Slightly Purplish-Red to Reddish.
Remark: -