If Urvon has been driven mad, Nahaz will simply take Cthrag Sardius from him and replace it with a piece of worthless rock.

From the moment the jackhammers and bulldozers had scraped against worthless rock, Inferno had been doomed.

What Gurn was offering was tempting- immediate safety without effort, incredible machines for worthless rocks.

I know worthless rocks when I see them.

I found evidence to indicate that the Sartan and the mensch did once inhabit that hunk of worthless, molten rock.

Kor allowed himself a sigh as he looked out on the worthless rock that was now his.

Suppose somebody left a hill of diamonds lying around and told you to guard this heap of worthless rocks?

Those worthless rocks had now become a cornerstone in his plans to advance the Night.

General Minerals trying to sell off a worthless rock to a tenderfoot-and it's loaded with Bodean hardware.

Instead of pay ore, they were getting worthless rock.