This pin is horseshoe shaped and has sparkling rhinestones atop an inlaid obsidian base. The rhinestones sparkle brightly, though the top stone has a small chip in the top (only seen under a high-powered loupe). The pin measures a mere 7/8" x 7/8" but makes up in beauty what it lacks in size. I believe it may be gold-filled, but is not marked. A perfect gift for the equestrian in your life.