Golden Stone

After Colin and Susan's saunter through the Earldelving, they emerge to meet a stromkarl:

'"See on Goldenstone, a stromkarl plays."
They had come to a junction in the path, and to their right stood a boulder, with nothing golden about it that the children could see: it was like any outcrop of weathered, grey sandstone, except that it had been crudely worked to an oblong shape by men long dead, and few now can tell its purpose.'