$250
How special could you feel by wearing sheer nail polish that has platinum dust in it? And how many people would be mad enough to do that? Many! The 'I Do' polish, the most expensive in the world, is a collaboration by Allure magazine, platinum supplier Johnson Matthey, PGI and Essie Cosmetics. The polish costs $250 per bottle. However, the first bottle was displayed in special bottle made with a platinum top and base that is valued at $55,000.