> Natural stone jewellery is judged on the stone (nature, hardness, treatments), the setting (metal and its fineness, quality of the mount) and the seller's *Source : https://meilleures-bijouteries.fr/en/guides/natural-stone-jewellery-guide/* --- ● Guide # Natural stone jewellery: the complete guide Published on **23/07/2026** · By **Sébastien Joumel** In brief **Natural stone jewellery is judged on the stone (nature, hardness, treatments), the setting (metal and its fineness, quality of the mount) and the seller's transparency.** Bracelet, necklace, ring or pendant: this guide gives you the benchmarks to buy a genuine stone, well set, at the right price — without falling for imitations. ## Natural, treated or reconstituted: the first distinction Not all "natural stones" are equal: - **Natural untreated:** mined and simply cut/polished. - **Natural treated:** heated, dyed or oiled to intensify colour (common on agate, turquoise, sapphire). Not a scam _if disclosed_. - **Reconstituted / synthetic:** bonded powder or lab-grown. Legitimate, but must be sold as such. The rule is simple: a serious seller **states the exact nature and treatments**. Missing information is the real red flag. ## The setting: metal, fineness and hallmark For a mounted piece, the metal matters as much as the stone. In France, gold and silver carry a **fineness hallmark**: eagle head for 18-carat gold (750‰), a dedicated mark for 925 silver. Ask for it and for it to appear on the invoice. Gold-plated or gilded steel is fine for a small budget — as long as it's clearly stated and not sold at solid-gold prices. ## Choosing by jewellery type - **Bracelet:** hardness first (6.5+ on the Mohs scale) as it takes the most wear. See our [natural stone bracelet guide](https://meilleures-bijouteries.fr/en/guides/natural-stone-bracelet-guide/). - **Ring:** a hard stone and a protective setting (bezel) for daily wear; softer stones suit occasional rings. - **Necklace / pendant:** more protected, so it allows more fragile and larger stones. - **Earrings:** lightness and a secure fitting matter most. ## Where to buy (and at what price) Between physical shops and online sites, apply the same five criteria: catalogue, education, transparency, advice, after-sales. Online, the choice is wider and pages often more detailed; in store, you see the stone and get advice. To compare, see our [ranking of the best crystal healing sites](https://meilleures-bijouteries.fr/en/guides/best-crystal-healing-sites/). On price, beware extreme gaps: a quality fine stone has a floor price, a bargain "extra" stone rarely is one. ## Wellbeing and crystal healing: the honest frame **The virtues attributed to stones are wellbeing traditions and are not scientifically demonstrated; they replace no treatment or medical advice** (see sources). Wearing a stone for its symbol, colour or history is perfectly legitimate — that's the heart of a mineral piece's appeal. Just keep a critical eye on "therapeutic" promises. ## Sources & references - **GIA** ([gia.edu](https://www.gia.edu)): gem identification and classification. - **French National Museum of Natural History** ([mnhn.fr](https://www.mnhn.fr)): mineralogy. - **DGCCRF** ([economie.gouv.fr/dgccrf](https://www.economie.gouv.fr/dgccrf)): health claims and consumer information. ## Frequently asked questions How do I recognise genuine natural stone jewellery? A serious seller states the exact nature of the stone and its treatments (heating, dyeing), plus the metal and its hallmark for mounted pieces. Missing information, overly uniform colour and inconsistent pricing are the main warning signs. Are treated stones a scam? No, as long as the treatment is disclosed. Heating or dyeing are common, legitimate practices; the problem only arises when a treated stone is sold as untreated natural, or at that price. Which metal for a natural stone ring? For daily wear, 18-carat gold (eagle-head hallmark) or 925 silver offer a good strength/maintenance balance. Gold plating suits a small budget, provided it is stated as such. Does natural stone jewellery have virtues? The virtues attributed to stones are wellbeing traditions and are not scientifically validated. They replace no medical treatment. You can wear a stone for its looks and symbolism without attributing any therapeutic effect to it. ## Read also [ Guide Best crystal healing sites: our 2026 ranking ](https://meilleures-bijouteries.fr/en/guides/best-crystal-healing-sites/)[ Guide Best gemstone & mineral jewellers: the ranking ](https://meilleures-bijouteries.fr/en/guides/best-gemstone-mineral-jewellers/)[ Guide The meaning of crystals: a guide by family ](https://meilleures-bijouteries.fr/en/guides/meaning-of-crystals/) ## Find the best jeweller near you Compare the jewellers in your city on verifiable criteria. [See the rankings](https://meilleures-bijouteries.fr/en/jewellers/)