Trying to figure out how to make an attractive seat for two in the yard without breaking the bank? Take a second look at that slab of rock laying around in the backyard. The idea originated with landscape designer, Michael Glassman while he was shopping for stone at a rock yard. Glassman used stone to make loose-stacked stone benches and tables.Stone is more durable than wood and other materials garden furniture is usually made of. Stone benches and tables are virtually maintenance free. Plus, the ones you construct using separate pieces of stone can often cost less than most pre-made wood, iron or concrete benches at the garden center.