[jinx]

It's similar to the Venus of Willendorf, which Jim mentioned, was written about by Jean Auel as an early religious symbol of mother earth.

As he spoke, Jondalar unconsciously reached into the pouch attached to his belt and felt for the small stone figurine of an obese female. He felt the familiar huge breasts, her large protruding stomach, and her more than ample buttocks and thighs. The arms and legs were insignificant, it was the Mother aspects that were important, and the limbs on the stone figure were only suggested. The head was a knob with a suggestion of hair that carried across the face, with no features. ...

He reached into his pouch. "I have something I want to give you, Noria." He took out the stone donii and put it in her hand. He wished there were some way to tell her how special it was to him, to tell her his mother had given it to him, to tell her how old it was, how it had been passed down for many generations. Then he smiled. "This donii is my Haduma," he said. "Jondalar's Haduma. Now, it is Noria's Haduma."


...
He sat at the edge, carving, shaping, sculpting, but he realized the ivory was not turning out to be ample and motherly. It was taking on the shape of a young woman. The hair that he had intended to resemble the style of the ancient donii he had given away - a ridged form covering the face as well as the back - was suggestive of braids, tight braids all over the head, except for the face. The face was blank. No face was ever carved on a donii, who could bear to look upon the face of the Mother? Who could know it? She was all women, and none.