A pair of Victorian diamond and blue enamel drop earrings, mid-19th century

A pair of Victorian diamond and blue enamel drop earrings, mid-19th century, formed of two lozenge sections joined by an articulated collet-set old cushion-shaped diamond, each lozenge centred with a cross motif lozenge of cushion-shaped diamonds and detailed with diamond-set leaves to the crossing within a lozenge-shaped blue guilloché enamel border, mounted in yellow gold, hook fittings, one small diamond and collet missing, length 6.4cm