Transposing the definition of an era to the jeweldesign in the 21th century is mainly focussed on content :

Baroque period, era in the history of the Western arts roughly coinciding with the 17th century. The work that distinguishes the Baroque period is stylistically complex, even contradictory. In general, however, the desire to evoke emotional states by appealing to the senses, often in dramatic ways, underlies its manifestations. 

Some of the qualities most frequently associated with the Baroque are grandeur, sensuous richness, drama, vitality, movement, tension, emotional exuberance, and a tendency to blur distinctions between the various arts.