Thanks, guys
DixC - yes, I bought this while I was away: in a shop in a cave up the Mount of Temptation in Palestine, near Jericho. It's 4 rows of assorted stone chips, twisted (or 'torsaged', as they say on QVC) together with silver (coloured) clasps. It is very 'me'! Maybe when I go back, God willing, next January, I'll find some matching earrings!