Chemical Composition: ICP-MS/AAA data from sample, Arsenical Copper:
Cu, 95.19; Sn, less than 0.25; Pb, 0.05; Zn, less than 0.001; Fe, 0.74; Ni, 0.53; Ag, 0.05; Sb, 0.09; As, 3.36; Bi, less than 0.025; Co, less than 0.01; Au, less than 0.01; Cd, less than 0.001
J. Riederer
Technical Observations: The patina is a mottled chocolate brown and light green with coppery metal shining through in a few worn areas. The surface has probably been waxed. Some cuprite and pitting is present. The blade end is mildly dented and notched in a few areas, probably from use.
The object features a simple flat shape that was cast in bivalve mold. Chatter marks and traces of hammering and filing are present on the body of the implement and on the edges from both its original finishing and a later cleaning.
Francesca G. Bewer (submitted 2012)