Two types of red surfaces were noted in the study of gold objects thought to be ancient (Chaps. 5—6):
Lepidocrosite, an iron oxide accretion that forms on the surface (a tide line on one rosette in 114 indicates that it had been deposited by liquid, and ground water would be reasonable, given the location of the tomb);
Silver-gold sulfide, a corrosion product of a silver-gold alloy resulting from the airborne attack of sulphur; see Frantz and Schorsch 1990.
(I
B. Tcnninal for C'at. 130
10—0 0"
C. Counterpoise, Cat. 131
D. Element for Cat. 132 (MMA 1982.137.3)
E. Element for Cat. 130 (MMA 1982.137.2)
108
H. Earring, Cat. 109 (MMA 26.8.93b)
I. Detail of MMA 26.8.130 (Cat. 141)
F. Types of elements used in Cat. 114
J. Bead found by Chaban, see Fig. 17k
K. Bead in Cat. 153
1. Bead in Cat. 151 (MMA 1983.137.4)
M. Above, bead in Cat. 130; below, bead in Cat. 137 (MMA 26.8.121a)
N. Bead in Cat. 153
Legend: Turquoise opaque glass | Blue translucent glass
Fig. 91a—n. Glass beads and glass-inlaid ornaments and elements associated with Wady Qurud. i:i