18K (750) gold and silver ring depicting a stylized knot set with rose-cut diamonds, the center one quadrangular. 17th century work. Finger size: 50. Gross weight: 7.7g (chips, bumps, traces of enamel) A 17th century diamond ring Comparable rings set with diamonds, rubies or emeralds are attested throughout Europe in the late 17th and early 18th centuries. Anna Beatriz Chadour, Rings, The Alice and Louis Koch Collection, London 1994, p. 236-237