This modern small ring with black onyx builds a solitaire form close to a promise ring - simple, geometric, focused on a single stone. The onyx, cut as a smooth cabochon, has a rich, deep black without the sheen of glass, matte and calm to the eye. Rhodium silver further brings out this depth, as the bright metal around the stone underscores the contrast of colours. Jewellers of old associated onyx with strength, resilience and confidence, which makes it a stone often chosen as a gift for a celebration.

Only a small portion of the reviewed raw material makes it into the piece - what matters is the purity of the surface and the depth of the black, free of streaks and discolouration. Silver and good stones are rising in price, so a ring like this at a reasonable price is worth considering today. Refined European silver sterling 925 confirms the purity of the alloy, and the piece is stamped with the French maker's mark, which denotes the origin of the silver. A layer of rhodium protects the surface against tarnishing and scratches, keeping the shine bright and clear for years to come. At a weight of 2.4 grams, the ring sits lightly on the finger, without weighing down the hand.

It works best in a total-black styling - a black turtleneck or a simple blouse becomes the backdrop against which the hand wearing the ring turns into a point of light. Rhodium silver reflects light more strongly than dark fabric, so the contrast is clear even with a modest outfit. It also suits a tailored blazer and a white shirt, where the geometric form of the solitaire pairs well with the clean lines of the outfit. This is a ring for everyday wear, when you want a distinctive but understated accent on your hand.