Place the manufactured cultural stone on the floor so you can design a pattern for your fireplace surround.
Affix felt paper with a staple gun on the wall surrounding the fireplace.
Mix the mortar with water in a bucket according to the directions on the bag of mortar.
Staple the metal lath to the felt paper with the staple gun, inserting staples every 6 inches.
Spread the mortar over the lath with the trowel, as well as the back of each stone. Put the stone on the lath and apply pressure to affix it to the lath.
Put mortar into a grout bag and squeeze it in between the cultured stones. Wipe away excess mortar with a damp rag.