This amethyst ring pairs a smooth, modern band with a stone cut as a cabochon that draws light into one dense point. The amethyst's violet shifts in places into a deeper purple, and flashes of a lighter shade appear as the hand moves. This colour has long been associated with calm and clarity of mind, which suits a ring meant as a promise and engagement piece. The stone's very big size gives the design a bold yet simple silhouette.

We chose the stone for this ring for its purity of colour and depth of tone, free of inclusions that would cloud the view into the cabochon - which is why it offers high quality at a price that stays reasonable. Silver and good coloured stones get more expensive year on year, so buying a piece like this now makes sense price-wise. The setting is refined European 925 silver plated with rhodium, which protects the surface from tarnishing and scratches so the shine lasts a long time. A pure alloy, free of nickel and other harmful additives, can be worn without worrying about skin irritation. The piece is stamped with the French maker's mark, which guarantees the metal's origin.

It weighs 5.2 grams and makes a clear statement on the hand, so it works well with evening looks built from simple pieces - a little black dress, a silk blouse or a smooth satin skirt all give it room to let the amethyst cabochon naturally draw the eye. The gesture of a hand wearing this ring gains weight, especially when the rest of the jewellery is kept to a minimum. This is a piece for a moment meant to be remembered - a promise ring that works equally well as an engagement ring.