PARIS — Ask any designer what the key to bringing to life a seemingly impossible idea is, and more often than not they’ll tell you that it wasn’t down to their imagination but to its combination with a master of the craft they wanted to tap.

This path from craft and mastery to unbridled inventiveness is at the heart of “Virtuosity,” the latest high jewelry collection from Louis Vuitton revealed Monday in a show at Bellver Castle, a striking Gothic-style landmark on the island of Majorca, Spain.