Quartz and Feldspar

Granite, a tough composite of quartz, feldspar and mica, is the stuff of Dartmoor, the most formidable of the five granite bosses punctuating Britain’s southwest peninsula. A miserable place of rain and bog or a sunny upland of exquisite natural beauty, here the elements are raw, the sky huge and nature seems ascendant.

But it is no less a place made by human beings. Stone circles, crosses, dwellin...