This striking rose-cut rainbow garnet from San Pedro Mountain exhibits unusually thick diffraction layers, producing a remarkably dimensional and vibrant display of lamellar diffraction iridescence. The spectral colors are bold, bright, and dynamic, shifting fluidly across the surface with even subtle changes in light. Although a pre-existing internal fracture runs through the stone, slightly affecting structural integrity, the quality of the diffraction is so exceptional that without it, this piece would be considered among the finest ever found from the mountain. Nevertheless, it remains an extraordinarily high-quality and important example from this famed New Mexico locality — a true collector's specimen or the centerpiece for a remarkable jewelry creation.