Brooches by Miranda Sharpe Perfect for everyday wear the petri brooch adds a splash of colour to any outfit. A simple silver circular brooch, engraved and enamelled with a cobalt blue enamel with a touch of detail in green, the enamel has a matt finish. The brooch has single pin fastening. Features Primary Material : silver Other Materials : vitreous enamel Pin Type : pin Dimensions (mm) : 30,30,5 One of a Kind : No Metal : silver Hallmarked : Yes Cleaning InstructionsThe brooch can be cleaned by using warm soapy water and an old toothbrush. A silver polishing cloth can also be used on the silver back of the brooch.