Chemical Composition: ICP-MS/AAA data from sample, Bronze:
Cu, 90.81; Sn, 8.74; Pb, 0.13; Zn, 0.008; Fe, 0.16; Ni, 0.06; Ag, 0.03; Sb, less than 0.02; As, less than 0.10; Bi, 0.045; Co, 0.024; Au, less than 0.01; Cd, less than 0.001
J. Riederer
Chemical Composition: XRF data from Tracer
Alloy: Bronze
Alloying Elements: copper, tin
Other Elements: lead, iron
K. Eremin, January 2014
Technical Observations: The patina is dark green with brown, and there are areas of blue in the interior. There are three rivets and one circular hole in the flange at the base of its neck that would have been used to attach the object to a cauldron. Inside the base is a circular area (4 mm in diameter) of bright metal possibly from a sample site. A flattened rivet is visible on the exterior of the flange at the same location as the exposed bright metal in the interior; it is probably an ancient rivet rather than a modern one, as corrosion matches the other surfaces.
The griffin protome was hollow cast in one piece. There are two drip marks from the wax visible in the interior of the object, as well as some possible tool marks from spreading wax in the mold. Along the interior flange of the base, where the attachment of the protome would occur, is a band (8 to 12 mm wide) with a sharply defined internal edge. This band may be related to the original model used for casting. Inside the object around the back of the griffin’s neck are the remains of dark gray core material. The object decreases in thickness from 4.5 to 3.2 mm.
The incised decoration was made in the wax model; soft contours consistent with working in wax are visible. Furthermore, the incised lines of the curling lock on either side of the neck are smooth and continuous. There is no evidence of the small impressions from individual hammer marks that are often associated with metal chasing techniques. The decoration around the mouth and ears was probably incised freehand, since some of the incisions are wider than others. The scales of the griffin may have been made freehand in the wax instead of using a lunate punch, since the scales vary in size, angle, and sharpness of the inner curve.
Tracy Richardson (submitted 1999)