A little extra luck never hurt...and in basic black and gorgeous gold, you're sure to hit a streak in style, lucky lady.  Three strands of faceted black onyx are a simple-but-glam setting for a pair of vintage black enamel and goldtone metal horseshoes, buckle elements from unused vintage stock discovered in a long-forgotten storage container from a costume jewelry firm that closed in the 1970s.   A gilt copper and black glass clasp brings the necklace together at 18" length.