From Finders Keepers:
"Cycladic idols come from the Early Bronze Age and became popular after World War II. It is estimated that around twelve thousand graves in the Cycladic Islands of the southern Aegean have been opened to find these idols. The slender carvings are notoriously hard to date,as is the exact manner of their use, because they almost all come from private sources rather than from archaeologists. They have almost no documented context" (Childs 112).
I also note that Barbar Pym writes of these; she has a character who has seen them on holiday in the Aegean. She tries to fashion them out of bread dough to relive the experience.