Deep, matte black onyx in this ring reveals its character only up close. The faceted cut draws from the stone a series of small, sharp flashes rather than a uniform gleam - light catches on the edges of the facets and fades into the depth of the black. Two cubic zirconia set beside the onyx add a cold, pinpoint sparkle that contrasts with the matte depth of the main stone. The simple, classic form of the band doesn't distract from this play of light - the hand leads the eye straight to the onyx.

An onyx like this, with an even, deep black free of the slightest scratch or discolouration, is easy to overlook among lower-quality stones - a second piece with the same depth of colour is hard to find today. The prices of silver and good natural stones are steadily rising, which makes a purchase like this sensible today. The ring is made of refined European silver 925, and a layer of rhodium protects the surface from scratches and keeps the shine far longer than the same silver would on its own. The metal is stamped with the French maker's mark - a guarantee of the quality and origin of the precious metal. Onyx has long been associated with strength, endurance and confidence, which makes it a fitting choice for a wedding or engagement ring.

For an evening out it pairs well with a little black dress and a silk blouse - the onyx echoes the deep black of the outfit, while the cubic zirconia add a pinpoint sparkle with every movement of the hand. By day it suits a smooth grey sweater and simple, classic clothes without excess ornamentation. The medium size and weight of 3.1 g give the ring a noticeable yet understated presence on the finger.