A group of buttons, 18th- early 20th century

A group of buttons, 18th- early 20th century, comprising: two pairs and two groups of three matching buttons set with faceted colourless pastes, largest 2.9cm diameter; a button set with orange and colourless pastes adapted as a brooch, 3.6cm diameter; a set of eight buttons set with coloured mother of pearl mosaics depicting floral sprays on a black ground, mounted in gilt metal, diameters 2.4cm each; and three additional paste buttons