A necklace, perhaps, in the form of a bird, in the windows of Boucheron, Pl. Vendome, Paris. Nothing is known about materials. The style is one of Boucheron's signatures, the "Question Mark" necklace, designed originally by Paul Legrand at the end of the 19th century.
aperture=f4.0 focal length: 7.4 mm exposure 1/60 sec ISO: 80