Fourneau was a painter close to the surrealist movement. The title of the painting (ca 1960) is Pierres, meaning “rock” or “stone” in French, derived from the Greek, πέτρος (petros), by way of the Latin, petra, becoming Pierre and Peter in English.
Alexander, one of my students, has a collection of rocks. I like rocks, too. He gave me a piece of pyrite, the fake gold, bless his little soul, but I returned it.