Sardinia, Su Nuraghe, The arch of Barumini No2
http://slicer93.mbsrv.net/20130127000525.jpg
You can sometimes find this type of stone is put in the center of the circles made of the low stone walls of Nuraghe.
The baby Stone humans seems to have been put on it.
They were given energy by the Stone humans whose shape were stone walls around.
The atoms of baby Stone humans were bonded firmly by the energy given to them and the Stone humans who had wings seemed to take the completed baby Stone humans to somewhere.