Cultured Stone® Trim Stones and Keystones are available in a range of carefully chosen colors designed to complement, blend or contrast with virtually any stone and/or stucco treatment. They can also be cut or shaped to conform to any arch radius, offering tremendous design flexibility.  A treatment for doors and windows that's equally at home with smooth stucco walls and with rugged surfaces and rough cut stonework, these stones can be cut or shaped to conform to any arch radius.