A surprisingly unnamed magnesian limestone sea stack on the Durham coast. The beach on which it sits, south of Seaham, is named after the Seaham Chemical Works which occupied the immediate cliff top for a short time. It was established in the 1860s, by the 1890s it had gone. But Chemical Beach continued to be abused. The sand was extensively removed by the Seaham and Londonderry Bottle Works to make glass and coal waste from the Dawdon Pit was dumped into the sea.
The beach and cliff top have been cleaned up. Natural is recovering. The magnesian limestone provides a rare habitat for flora and butterflies and is under the protection of the National Trust.