The deep, velvety black of cabochon-cut black onyx draws light onto its smooth, domed surface and reflects it in a single, distinct point of shine. The very big size of the stone and the loose, slightly raw form of the band give this ring a clear boho and vintage character, as if pulled straight from a family jewellery box. Onyx has long been linked with perseverance, inner strength and self-confidence, which makes it a fitting choice for a wedding and engagement ring - so the thought of engagement and marriage stays close at hand here.

We select only stones with a uniform, deep black free of streaks or discoloration, because it is precisely this purity of colour that determines the value of a piece. Good-quality onyx of this calibre is becoming harder to source, and the prices of silver and precious metals are rising, so deciding to buy now makes sense. The stone is set in refined European silver 925, whose purity - free of nickel and other allergy-triggering additives - means the piece does not cause allergic reactions. The whole ring weighs 6.0 g, and its craftsmanship is confirmed by the French maker's mark, which attests to the origin of the silver.

This black pairs well with a spring look built on pastels: a light-coloured trench coat, a silk scarf in a soft shade and a light beige handbag let the hand wearing the ring stand out without competing with the rest of the outfit. Onyx also works well against dark, classic clothing, where its matte shine does not get lost in the background. This is a ring that holds up well to everyday gestures - from a handshake to brushing back your hair - and its size and form lend the hand a distinctly bold character.