Focus on... Camilla's Jewels: Pearl and Aquamarine Choker

One of the Duchess of Cornwall favourite pieces is undoubtedly her aquamarine choker.

The Duchess of Cornwall's Aquamarine Choker

The three-string pearl choker features a spectacular detachable step-cut aquamarine pendant with brooch fitting. The aquamarine nests in an elaborate yellow gold scrollwork frame which also features ten brilliants.

The provenance of the choker was long disputed; some said it was a gift from the Prince Charles, while others claimed she got it from her first husband, Andrew Parker Bowles. However, it was eventually revealed that the choker is actually a family heirloom which the Duchess had inherited from her mother, the Honourable Rosalind Cubitt.

Focus on... Kent Jewels: The Argyll Daisy Brooch

These lovely daisy brooches come from the collection of Princess Louise, Duchess of Argyll.

There are three brooches, one large and two smaller ones. They were made by Garrard and are encrusted by diamonds set in white and yellow gold.

Princess Louise was the second youngest daughter of Queen Victoria and Prince Albert. The diamond daisy brooches were a present to Princess Louise from three of her siblings – Prince Arthur, Prince Leopold and Princess Beatrice – on the occasion of her marriage to the Marquess of Lorne (then heir to the Dukedom of Argyll).

British Royal Jewels: Empress Maria Feodorovna's Sapphire Choker

Some of my favourite jewels in the British royal collection have Russian provenance, including this magnificent sapphire choker.

Empress Maria Feodorovna's Sapphire Choker

The choker consists of four strands of pearls (a total of 164 of them) with 20 diamond-encrusted vertical bars between every two or three rows of pearls. Each diamond bar is studded with five brilliants. The large sapphire in the middle is surrounded by two rows of brilliant-cut diamonds. 

Italian Royal Jewels: Queen Margherita of Savoy's Emerald Parure

One of my favourite emerald sets of all times has to be Queen Margherita of Savoy's emerald parure.

Parts of the original parure: the necklace (with detachable centrepiece), the devant de corsage, and the earrings

This gorgeous parure may no longer be in one piece and indeed, no longer with the House of Savoy, but we can still admire its exquisite beauty. It is notable also notable for its historical value, the emeralds of amazing quality, and the somewhat unusual combination of emeralds, diamonds and pearls.

The parure made its way into Savoy jewellery collection as part of a marriage settlement: in 1841, King Charles Albert of Sardinia acquired the set from Viennese jeweller Delsotto for the marriage settlement between Archduchess Maria Adelaide of Austria (future Queen Adelaide) and his son, the Duke of Savoy (future King Victor Emamanuel II).