The deep blue of the topaz in this engagement ring recalls the retro lineage of vintage form. The faceted cut divides the stone into small planes that catch light from every angle of the hand and reflect it with a cool, clear sparkle - no cloudiness, no heavy dark patches. A delicate border around the setting keeps the eye on the stone rather than drawing attention away from it, and the slim band leaves the hand light and free in movement.

The topaz set here was chosen for its pure, saturated colour - it was this quality that decided this particular stone made it into the ring, and not another. Refined sterling silver 925, with a high-purity alloy, contains no nickel or other sensitising additives, so even sensitive skin can wear it without irritation. A rhodium layer protects the surface against tarnishing and scratches, so the shine needs little upkeep. The piece is stamped with the French maker's mark, which attests to the metal's origin. Silver and fine coloured stones rise in price year after year, and topazes of such pure colour are becoming increasingly rare - which makes this purchase a sound one from a price standpoint today.

The ring sits well among weekend layers: under a loose oversized sweater, with a wool scarf draped over the shoulders, alongside muted greys and beiges. The cool blue of the topaz stands out against such styling and draws the eye as the hand lifts a cup of tea or adjusts the scarf. It's a quiet, everyday take on vintage that needs no evening dress to look its best.