Unusual Georgian domed agate rivière with concentric banding patterns  in shades of salmon pink, peach,cream, grey and translucent white.c.1820.
Cut-down crimped settings in 9 carat gold. Original closed back clasp.
I have only ever had crosses and one pair of earrings in this particular type of agate, this is the first full necklace I have seen.
Approx 17inches length.