More than 400 examples of Scottish Carved Stone Balls have been found. They are believed to have originated in the late Neolithic and the Bronze Age - i.e. thought to be more than 5,000 years old.
Most have been found in north-east Scotland, mainly Aberdeenshire. They usually range in size from 70 to 90mm diameter, and are hand-carved with varying numbers of symmetrically-arranged protruding bumps on the surface (from 3 to over 150) .
Their purpose is unknown. Suggestions include :
See photos and 3-D rotatable scans of examples held at the National Museum of Scotland [requires modern web-browser]:
Also see :
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