  Grossular.  
Description from the source: 
Grossular (Ca3 Al2 (Si O4)3 cub.), Lake Jako, Sierra de las Cruces, Chihuahua, Mexico. Perfect rhombohedral crystal. 2,2x2x1,8 cm; 16 g. 
Source: Simone Citon 
Contributor: John Gray 
Acquired: 30 September, 2008 
Text Updated: 1 October, 2008 
Price: Trade 
Size: 1" 
Composition: Ca3Al2(SiO4)3
 |  
  |  
 |  
  |