2500 лет до Платона.



http://www.neverendingbooks.org/the-scottish-solids-hoax

Хранятся в Эшмоловском музее (Оксфорд)

http://www.ashmolean.org/ash/britarch/highlights/stone-balls.html

Stone ball with 7 knobs from Marnoch, Banff (AN1927.2728)
Stone ball with 6 knobs and isosceles triangles between, from Fyvie, Aberdeenshire (AN1927.2731)
Stone ball with 6 knobs and isosceles triangles between, from near Aberdeen (AN1927.2730)
Stone ball with 4 knobs from Auchterless, Aberdeenshire (AN1927.2729)
Stone ball with 14 knobs from Aberdeen (AN1927.2727)

Carved stone balls from Scotland are an enigmatic class of objects. They seem to date mainly to the Late Neolithic period (c. 3000 - 2500 BC), and are made of various stones ranging from sandstone to granite. They are all of a relative similar size and are decorated with carved evenly-spaced patterns of circular bosses or knobs around the surface of the sphere. The designs vary with the majority being based around a series of six bosses, but the number of bosses varies from 3-160. Some carved balls are more skilfully manufactured than others, and a rare few have additional decoration. All show an appreciation for symmetry in the design.

https://ivanov-p.livejournal.com/119848.html