First released in 1973, “Diamond Girl” sits in the soft-rock vein that carried Seals and Crofts onto mainstream radio, crossing over from the pop charts to adult contemporary audiences. Its subject is everyday devotion rendered in clean harmonies and unhurried rhythm, a style that reads now as a document of early‑’70s West Coast optimism. No specific New York City premiere history is widely documented, but the song’s long afterlife in the region persists in a live setting at NJPAC, with featured performers including David of Nice N Wild, Cynthia, Lisette Melendez, and 2 Without Hats. The restraint is the point, and it holds up.