Last Saturday at the Farmers' Market on the Square, I was captivated by the items for sale at a booth labeled "Hypertufa Garden Art." Fortunately, I knew the people who were manning the booth, so I ...

Hypertufa (pronounced hyper-toofa) is a type of artificial stone. It was first created in the mid-19th century by mixing sand, peat, various volcanic aggregates and cement. It's relatively lightweight ...