Here is an example of the way things happen sometimes.

I found a small piece of serpentine on a backpacking trip, and for several days I scraped on it with my pocket knife. 

The more I played with it, the more it reminded me of cloak and dagger stuff, of spies, and of a dark kind of secrecy that is ominous and to be avoided at all costs. 

Back at home, I photographed it on a round of firewood and gave it to my backpacking partner.

Photo by Lee Gass.