Block Quilts
Block quilts are made by piecing rectangular (usually square) blocks of cloth together. This forms a regular pattern. The blocks may be decorated with fabric paint, appliqués, or other methods. They can be made from cloth with a single solid color or from prints.
Crazy Quilts
This art form was developed in United States during the 1880's when it created quite a stir. Crazy quilting does not actually refer to a specific kind of quilting (the needlework which binds two or more layers of fabric together), but a specific kind of patchwork. Crazy quilts rarely have the internal layer of batting that is part of what defines quilting as a textile technique.
Regular patchwork combines the pieces of fabric into a predetermined and regular design, but crazy patchwork uses irregular pieces of fabric on a foundation fabric or paper. This may create haphazard-looking and asymmetrical designs, or the designer may use some control in placement. The patches and seams are then usually heavily embellished.