the Golden Citrus Mini Decorative Soap has goldleaf embellishments
I just realized I have tons of goldleaf that I use while doing acrylic nail designs..glad you brought this up because now I have more decorating ideas! hehehee
ETA: I also found this doc. online...it has some recipes and the very last one also calls for goldleaf decoration
I have just done Gold on top of one of my soaps, it was edible 24k gold leaf. Use tweezers, add it to slightly damp soap (after saponification) and expect some of it to disintegrate!
Good luck!