The moonstone cabochon pairs a smooth, domed surface with a blue flash that appears and disappears with every movement of the hand. This effect, known as adularescence, isn't scattered across facets by the cabochon cut - instead it's concentrated into a single, travelling point of light. The plain, modern band doesn't compete with this play of light - the very big size of the stone means the ring works equally well as an engagement or wedding proposal. Moonstone has long been associated with intuition and inner focus, making it a fitting choice for such an occasion.

Before it's set, every cabochon is checked against the light - what matters is the depth of the flash and the clarity of the surface, with no cloudy patches. Silver and good-quality moonstones are steadily rising in price, so buying at this price today makes sense. Refined European sterling silver 925 contains no nickel or other sensitising additives, so even sensitive skin can wear this ring without irritation. A layer of rhodium protects the surface against tarnishing and scratches, keeping upkeep to a minimum. The piece is stamped with the maker's mark establishing its origin, registered with the French assay office.

Styled for the city, this ring pairs well with plain jeans and a white shirt, while a leather jacket thrown over the shoulders gives the whole look a modern edge. The blue flash on the hand stands out clearly against the muted tones of such an outfit. It also comes into its own with everyday, casual gestures - a hand resting on a bike handlebar or holding a cup of coffee shows the stone from a different angle each time. The very big size of the cabochon means the gesture of the hand becomes part of the whole look.