It was under the Mughals that Indian craftsmen mastered the technique of kundan work, the setting of precious and semi-precious stones within bands of highly purified soft gold. The characteristic feature of this type of setting lies in applying pieces of pure gold leaf or kundan in the space between the stone and its gold frame in order that the stone remains firmly set. Often kundan work is combined with enamelling or meenakari, so that a piece of jewellery has two equally beautiful surfaces, enamel at the back and kundan set gems in front. Today both Gujarat and Rajasthan are renowned for this work.