St Breock Downs Monolith Cornwall

The stone is made from the local Devonian shale which has extensive feldspar veining, and it is estimated to weigh around 16.5 tonnes. It is 4.92 metres long and stands to a height of just over 3 metres above ground level. It stands on a low stone mound or cairn with a diameter of around 10 metres. It is believed to be Late Neolithic or Early Bronze Age (around 2500-1500 BC).