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Pure gold is a noble metal: it does not oxidise and does not rust, even after centuries. This is why Egyptian jewels thousands of years old are found intact. In 18k, the 25% alloy may react slightly, but gold keeps its lustre far beyond a human lifetime.

Measure a ring that already fits you: its inner diameter in millimetres gives your finger size. Measure at the end of the day, when fingers are slightly swollen, never in the morning or in cold weather. Half a size changes the comfort — better a ring that clears the knuckle without forcing.

Tourmaline is one of the most varied gems: green, pink, blue, bicolour. Its hardness (7 to 7.5 on the Mohs scale) makes it suited to regular wear. Its high refractive index gives it a rare luminous depth. Each stone is unique, no two ever alike.

Remove your jewellery before showering, exercising, swimming, or cleaning. Chlorinated products and cosmetics dull its shine. A bath of warm soapy water and a soft brush are enough to revive gold. Store each piece separately to avoid scratches.

A made-to-order piece is not produced in advance. Each jewel comes into being after your order: casting the metal, shaping, hand-finishing, inspection. This lead time guarantees a piece made for you, with no stock and no overproduction — the opposite logic of fast fashion.

Sterling silver contains 92.5% pure silver, alloyed with 7.5% copper for strength. The French hallmark is the Minerva head. Silver oxidises naturally in contact with air — this patina lifts away with a dedicated cloth. It is not a flaw, but a characteristic of a living metal.

18k gold contains 75% pure gold (750‰), the rest being alloy metals. In France, look for the official hallmark: the eagle's head for 18k gold, alongside the maker's mark. Genuine 18k does not tarnish, does not react to a magnet, and keeps its lustre over time. The nitric acid test remains foolproof but destructive — for a professional only.

The colour of 18k gold depends solely on the 25% alloy. Yellow gold blends copper and silver in balance. White gold adds palladium (often rhodium-plated at the surface for its cool brilliance). Rose gold draws its hue from a higher proportion of copper. The purity stays identical — 750‰ in all three cases.