Gen info Chanca piedra is Spanish for "stone breaker," used by indigenous peoples of the Amazon as an effective remedy for the treatment of gallstones and kidney stones.. Botany Sampasampalukan is an erect, branching, slender, smooth herb growing 50 to 60 centimeters high. Leaves are small and oblong, alternate and often imbried, oblong to ellipticoblong, 5 to 8 millimeters long, rather ...