How do I date a blue enamel pin?

Dating relies on stylistic clues like the geometric lines of Art Deco or the organic curves of Art Nouveau. Maker marks and metal testing also point to specific manufacturing decades. Clasps and pin stems offer further evidence, as safety catches and tubular hinges replaced simple c-clasps by the early twentieth century.

Are these pins made of solid silver?

Many pieces utilise sterling silver or silver gilt as a primary foundation for the enamel work. Gold and 18ct gold appear in select Edwardian and Art Nouveau examples. Hallmarks stamped on the reverse of the metal often confirm the specific purity and origin.

How should I store my enamel brooch?

Keep enamel pieces in a lined box separated from other jewellery to prevent scratching the glass surface. Avoid prolonged exposure to direct sunlight and moisture. Treat the delicate glass surfaces with care, as sharp impacts can chip the vitreous glaze from its metal base.

What is the difference between guilloche and cloisonne?

Guilloche involves engine-turning a precise geometric design directly into a metal disk before applying translucent enamel over the top. Cloisonne builds up raised wire walls to separate distinct pools of coloured enamel. Both techniques create patterned surfaces, but guilloche relies on mechanical engraving while cloisonne uses soldered wire.