The prodigal daughter

She soon saw why. An opening in the side of the cavern revealed the tall, ugly, one-eyed monstrosities as they worked. Hammers lifted in thick hairy arms, only to come crashing down on white hot metal. The Cyclopes weren't even using gloves to handle the hot metal, often using their meaty fingers to shape their creations.

Shelly didn't realize she'd stopped to watch until Jessica tugged her arm to get her moving again. It was almost hypnotic, the way they worked, heating the metal, then pulling it out and either banging on it, or using their hands to shape it, and then shoving it back into the fires to heat it to a searing white color. Most of these items would never leave this cave. Only the Cyclopes would use them, but those that did make it away would sell for a high price. There was a healthy black market for such items on Earth.