This superb miniature-sized matrix specimen from San Pedro Mountain showcases a sharply crystallized and fully terminated rainbow garnet perched delicately on a bed of fine iridescent druzy andradite. The isolation and aesthetic placement of the main crystal are exceptional for this locality—finding well-positioned, complete crystals on matrix is exceedingly rare, especially when paired with vibrant diffraction and minimal contact.

The main crystal displays intensely bright metallic lamellar diffraction, with shifting flashes of neon green, violet, gold, and magenta dancing across its natural faces. A small contact on one edge reveals an internal plane of striking emerald-green iridescence, further emphasizing the complexity and color depth of this rare phenomenon. The underlying druzy andradites shimmer subtly with their own spectral sheen, providing a luminous contrast and elevating the overall composition.

San Pedro Mountain is one of only a handful of localities worldwide known to produce naturally iridescent andradite garnets. Most material recovered shows only partial diffraction, and high-quality matrix specimens with strong crystal isolation and aesthetics are vanishingly uncommon. This piece is a top example of its size class and a perfect addition to a high-end collection focused on optical phenomena, North American classics, or garnet mineralogy.