This is a matrix specimen of weloganite from the long-closed Francon Quarry, St. Michel, Isle Montreal, Montreal, Quebec, Canada, the type locality for this rare carbonate mineral. The crystals on this piece are somewhat rounded, with an interesting bubbly appearance that is unusual for the locality. The Francon quarry stopped operating in 1981, though it remained open to visiting mineral clubs until the late 1990's. It will probably never be worked again, since it is right in the middle of Montreal, is owned by the city, and is in a residential district. Today the city uses it to dump snow in the winter.