Abstract: Probably first found in Arabia, then Moctezuma, Sonora (the type locality), finally at Tombstone, Arizona. Crystals are cubic, invariably octahedral in habit, up to 2 mm in size. Colour forest green (RHS 136A), H = 3, D = 6.4.

Wet chemical analysis gave CuO 11.0%, PbO 33.0, TeO₂ 50.7, H₂O 3.4; soluble in cold dilute acids. The strongest lines are 7.223(5), 4.170(2), 3.614(3), 3.472(4), 3.343(6), 3.036(10), 7.952(3), 2.454(5) Å. The cell indexes as cubic, a = 12.519 Å; for Z = 12, ρ_calc = 6.41 g/cm³. May be anisotropic in thin section with birefringence up to 0.011; n = 2.04.