The rich blue of turquoise in this ring shifts in tone with every movement of the hand - from a cool, deep hue to lighter flashes as the stone catches the light at a different angle. The cabochon cut highlights the smooth, domed surface of the turquoise and draws the eye straight to it. The simple, modern band keeps attention on the stone rather than pulling it away - the metal line stays narrow and disciplined, and the whole design gains a sense of lightness despite the bold colour.

Before the turquoise was set, it was assessed for evenness of blue and purity of colour - stones like this come from the Sleeping Beauty mine in Arizona and rank among the most sought-after in the world. Good turquoise is becoming harder to find, and the prices of silver and precious metals are rising, which makes this purchase good value today. The stone is set in refined sterling silver 925 of high alloy purity, free of nickel and other sensitising additives, for comfort even on sensitive skin. A rhodium layer protects the surface from tarnishing and keeps the metal's shine for years to come. The piece bears a maker's mark registered with the French assay office, attesting to the origin of the silver. This design works equally well as an engagement ring or as a promise ring.

Styled in total black - a black turtleneck or a simple blouse - the hand wearing this ring becomes the point where light catches most strongly. The turquoise stands out against muted black, and the modern line of the band pairs well with a plain, understated watch on the other wrist. It also looks good with a charcoal jumper and dark, straight-cut trousers, where the colour of the stone becomes the outfit's one striking accent. The medium size means the ring sits comfortably on the finger all day long.