  We introduce the idea of natural mass matrices, an organizing principle
useful in the search for GUT scale quark mass matrix patterns that are
consistent with known CKM constraints and quark mass eigenvalues. An
application of this idea is made in the context of SUSY GUTs and some
potentially ``successful'' GUT scale mass patterns are found. The CKM
predictions of these patterns are presented and some relevant strong CP issues
are discussed.
