Close to the top-end of the luxury watch market are these three highly limited production Richard Mille watches with cases produced from sapphire crystal. Each costs over a million dollars, with the new for 2014 RM 56-02 watch priced at over two million dollars. Rare and extremely exclusive, these are a uniquely "transparent" take on ultra-luxury. Synthetic sapphire is a major part of modern watch manufacturing. Typically used for just the crystals over watch dials (and casebacks), here Richard Mille has adopted the material for the entire watch case.