Diamonds are not just beautiful, but also rank with the best engineering materials. Diamond would make an outstanding wear surface, and someone has finally figured how to do it. Advanced Diamond Technologies Inc has launched a new family of ultrananocrystalline diamond seals that promise to extend pump lifetimes significantly. Compared with the cost of a pump, diamond-coated surfaces are cost-effective enough to compete with conventional silicon carbide, company president Neil Kane claims. This is a big breakthrough for synthetic diamond films, which have been around since the 1980s. Advanced Diamond Technologies licensed the technology and spent two years making it reliable and economical.