The Most Ridiculously Expensive Nail Art in the World. If you like these luxurious designs, be ready to drop mega bucks. Maybe you'll feel good having a house (or at least a Honda Civic) on your hands, or maybe you'll feel like a fool. But check these out either way. Ridiculousness. London-based company Cherish...ME has created the most expensive manicure known to woman: the Iced Manicure. Couldn't make this up if we tried—it's 10 carats of conflict-free diamonds glued to your nails. Love it? It's $51,000.