This vintage lapis lazuli ring pairs the stone's deep navy with the cool shine of rhodium silver. Before being set, this cabochon was assessed for depth of colour and an even, dark purple-blue free of lighter blotches. The domed cut brings out the stone's rich, uniform glow without scattering it through facets - light glides across the smooth surface instead of breaking into small glints. The retro silhouette of the setting, with its clearly defined outline around the stone, sits well with the noble, understated character of lapis lazuli. Across many cultures this stone has long been linked to intuition, idealism and inner harmony - a connection that makes it a fitting choice for an engagement ring.

Each cabochon like this one is selected with care for purity of colour, so the quality on show here rarely comes at such a reasonable price. Silver and good-quality coloured stones get more expensive year on year, and lapis lazuli with such a deep tone is becoming harder to find - this is a good moment for a purchase like this. The ring is made from pure, refined sterling silver 925, and a rhodium layer protects its surface against tarnishing and scratches, keeping the shine bright for years. The alloy contains no nickel or other irritant additives, so it can be worn on the hand without concern. The silver bears a maker's mark registered with the French assay office, which attests the metal's origin.

The very big size and weight of 6.1 grams give this ring a clear, confident presence on the hand. In a total black look, with a black turtleneck or a plain, unadorned top, the navy of the lapis lazuli draws the eye and sets the rhythm of the whole outfit. It also works well with a dark coat and leather gloves in winter, when the hand remains the focal point of the styling. This is a ring that stands up equally well to everyday wear and an evening out.