This Cartier tiara dating from the 1930s is one of three vintage tiaras from the estate of Mary, Duchess of Roxburghe, set to go under the hammer at next month’s Magnificent Jewels and Noble Jewels Sale at Sotheby’s Geneva (estimate: $306-505,000).

This Cartier tiara dating from the 1930s is one of three vintage tiaras from the estate of Mary, Duchess of Roxburghe, set to go under the hammer at next month’s Magnificent Jewels and Noble Jewels Sale at Sotheby’s Geneva (estimate: $306-505,000).