A stick pin mounted with a pear-shaped rose-cut diamond

A stick pin mounted with a pear-shaped rose-cut diamond, a gold stick pin mounted with a horse's head and neck pavé-set with diamonds, black enamel tack and ruby eyes, a stick pin mounted with a Mercedes Benz emblem set with small diamonds, a gold stick pin mounted with a carved moonstone cameo depicting a lady in Renaissance costume, and a gold stick pin mounted with a drop-shaped untested pearl.