Charmstone

A charmstone or coldstone is a stone or mineral artifact of various types associated with various traditional cultures, including those of Scotland and the native cultures of California and the American southwest. Typically they are elongated or cylindrical and have been shaped by grinding or other human activity, and may be perforated and/or grooved. They are thought to have been regarded as having some religious or magical function, including being talismans, amulets or charms.

Typically, references to American examples use the single word charmstone, while references to Scottish ones break the term as charm-stone or charm stone.