She says, "When it comes to jewellery, I'm a big fan of layering up, so a short, choker necklace is a must. As Amanda shows, it works really well with shirt collars on its own, or with necklaces ...

Clue: Made in 1830, this extravagant pink topaz brooch has been worn as a clasp on a five-strand pearl necklace since 2008. It was recently spotted at Royal Ascot in June. 2.