Locality: Ahumada Mine, Chihuahua, Mexico
Size: 62 mm x 50 mm x 39 mm (2.4 in. x 1.9 in. x 1.5 in.)
Weight: 115 g (4.5 oz.)
Endlichite, also called arsenatian vanadinite, is a variety of vanadinite in which arsenic has taken the place of vanadium. This specimen has pointed chocolate brown crystals.