What is the difference between keystone blocks and rockery rocks?
Rockery rocks (one-man, etc.) are naturally occurring rocks that come from a quarry, where they are broken up into pieces from even larger rocks. Keystone is one type of a manufactured concrete sculpted block that is available in many different types and brands, made by many different manufacturers, and that comes in a variety of colors. The choice between rock and keystone is largely aesthetic. Some like the more rustic look of natural rocks, while others think that keystone walls offer a cleaner, more sanitary look. Keystone walls can typically be built higher, and many textures are available for the face of the wall (flat, 3-sided, tumbled, and so on). Your local hardware store probably has several varieties to choose from.
