Wiktionary
a. 1 Yet to be altered, carved, milled, worked, or otherwise changed from its natural or crude state. 2 (context archaeology English) Describing an unaltered material found associated with human tool-making or other cultural activity.
Usage examples of "unworked".
Here and there mounds of the rosy micaceous schist, still unworked, looked as if it had been washed out by the showers of ages.
It helped considerably to know that he was not alone in the world, was not the only one with the ability to espy secret horrors lurking in innocent-looking pools of water and unworked stone.
One wall was bare, unworked stone: the naked rock of the granite monolith itself.
His coat was dark gray wool without a stitch of embroidery, the stallion's saddle cloth simple, and his sword's hilt and scabbard had been covered in unworked boarhide ever since it came into his possession, nothing to pull a second glance.