Rock Diver by Harry Harrison:
Science Fiction Inventions, Technology and Ideas

Splendid little story describes the amazing life of a guy named Pete, who walks through rock looking for valuable minerals. One well-thought-out twist after another. Damon Knight says you will find it as fascinating as he did when it came across his editorial desk, and I'd agree. Select an invention:

Helmet-Mounted Display Screen - display where you need it
A small electronic display mounted for easy viewing.

Ultra-Light
Allows the user to see into rock or other solid matter.

Vibratory Mass Penetrator - not what you're thinking
A device that allows a person to walk through earth and even solid rock.

 

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Science Fiction
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