Description Also called adder stones, which stones, serpent's eggs, Glain Neidr in Wales, Milpreve in Cornwall, Gloine nan Druidh (Druids' glass in Scottish Gaelic), aggry in Egypt. These stones have a naturally occuring hole in them, and were often believed to have magic powers, such as warding off the Evil Eye, seeing through to the faerie realm, preventing nightmares, curing diseases. *** [Facebook • Tumbrl • Official site • Twitter