Formula: Cu₃Al₄(PO₄)₃(OH)₉ · 4H₂O

Species: Phosphates

Colour: Pale blue to turquoise blue

Lustre: Dull

Hardness: 1½

Specific Gravity: 3.016

Crystal System: Tetragonal

Name: Named after Emiliano Zapata (1879-1919), peasant hero of the Mexican revolution. He was the Mexican rebel leader who stated that “It is better to die on your feet than to live on your knees.” He was a former sharecropper who organised and led peasants during the battles of the Mexican Revolution.

Type Locality: Unnamed prospect, Cerro Morita, Naco Municipality, Sonora, Mexico