Big rock $ 25.00 a ton hand picked $40.00 a ton large landscaping stones ( 2' and up) $ 60.00 a ton b gravel (100 % fractured) $ 20.00 a.Boulders and other non-stock rock can be ordered on special requests. crushed concrete. 1). 21aa crushed concrete: 1-1/2″ max. in size and predominately used as a top dressing for driveways. 2). 1” x 3” crushed concrete: this is primarily used as a base coat for new driveways or roads. limestone.