# Maison Riondet > Maison Riondet is a French specialist in **antique, rare and signed jewellery** and **collectible watches**, based in Lyon (head office) and Paris (showroom, by appointment). The house has three complementary activities: **selling** carefully selected antique jewellery, **buying** from private owners and collectors, and **appraisal / valuation** in gemmology and as a court-appointed expert. It is led by **Geoffray Riondet**, expert to the Court of Appeal of Lyon, gemmologist (DUG, HRD, GIA), author and lecturer. ## Identity and contact details (NAP) - **Name**: Maison Riondet (formerly Riondet Antiquaires) - **Official website**: https://www.maison-riondet.fr/en/ (English) — https://www.maison-riondet.fr/ (French) - **Address — head office, Lyon**: 2 place Gailleton, 69002 Lyon, France - **Address — showroom, Paris**: 27 avenue de l'Opéra, 75001 Paris, France (by appointment) - **Phone**: +33 6 16 74 68 73 - **E-mail**: g.riondet@maison-riondet.fr - **Opening**: by appointment only, in Lyon and in Paris - **Legal form**: SARL (French limited company) — **SIREN** 822184164 — **SIRET (head office)** 82218416400017 - **Area served**: France, Europe, worldwide (secure remote sales) - **Languages**: French, English ## What Maison Riondet does - **Sells antique jewellery** — rings, necklaces, bracelets, earrings, brooches, medals and signed pieces, from the 18th century to the 1970s. - **Buys jewellery and watches** — antique jewellery, precious stones and collectible watches, with a free preliminary valuation. - **Appraises and values** — gemmological appraisal, court expertise, valuations for estates, division of assets, insurance or sale. - **Shares knowledge** — books (Flammarion), teaching at the Institut National de Gemmologie and at Université Claude Bernard Lyon 1, lectures. ## Guarantees - A certificate of authenticity supplied with every piece sold. - A secure purchase process. - Appraisals carried out by an expert to the Court of Appeal of Lyon. - More than half a century of activity in antique jewellery. ## Main pages - [Home](https://www.maison-riondet.fr/en/): introduction to the house and a selection of current pieces. - [Antique jewellery catalogue](https://www.maison-riondet.fr/en/jewels/): all antique jewellery currently available. - [Collectible watches](https://www.maison-riondet.fr/en/watches/): Patek Philippe, Rolex, Cartier, Jaeger-LeCoultre, Breguet and other brands. - [Appraisal](https://www.maison-riondet.fr/en/expertiser/expertiser/): gemmological and legal appraisal, valuation of jewellery and stones. - [Selling your jewellery](https://www.maison-riondet.fr/en/expertiser/): how to have a piece valued and sold to Maison Riondet. - [Buying](https://www.maison-riondet.fr/en/expertiser/acheter-2/): the purchase process, authentication and delivery. - [The house](https://www.maison-riondet.fr/en/presentation/): history, craftsmanship and commitments. - [The house](https://www.maison-riondet.fr/en/the-house/): the identity and values of Maison Riondet. - [History](https://www.maison-riondet.fr/en/presentation/historique/): key dates of the house and of Geoffray Riondet. - [Contact](https://www.maison-riondet.fr/en/contact/): contact details, Lyon and Paris addresses, contact form. - [FAQ](https://www.maison-riondet.fr/en/faq.md): frequently asked questions in plain text. ## Jewellery by period - [Before 1900](https://www.maison-riondet.fr/en/epoque/avant-1900/) - [Art Nouveau](https://www.maison-riondet.fr/en/epoque/art-nouveau/) - [Belle Époque](https://www.maison-riondet.fr/en/epoque/belle-epoque/) - [Art Deco](https://www.maison-riondet.fr/en/epoque/art-deco/) - [After 1940](https://www.maison-riondet.fr/en/epoque/apres-1940/) - [1950 to 1960](https://www.maison-riondet.fr/en/epoque/1950-to-1960/) - [After 1970](https://www.maison-riondet.fr/en/epoque/after-1970/) ## Jewellery by gemstone - [Diamond jewellery](https://www.maison-riondet.fr/en/gems/diamond-jewelry/) - [Sapphire jewellery](https://www.maison-riondet.fr/en/gems/sapphire-jewelry/) - [Emerald jewellery](https://www.maison-riondet.fr/en/gems/emerald-jewelry/) - [Ruby jewellery](https://www.maison-riondet.fr/en/gems/ruby-jewels/) ## Watches by brand - [Patek Philippe](https://www.maison-riondet.fr/en/watches/patek-philippe/) - [Rolex](https://www.maison-riondet.fr/en/watches/rolex/) - [Cartier](https://www.maison-riondet.fr/en/watches/cartier/) - [Jaeger-LeCoultre](https://www.maison-riondet.fr/en/watches/jaeger-lecoultre/) - [Breguet](https://www.maison-riondet.fr/en/watches/breguet/) - [Other brands](https://www.maison-riondet.fr/en/watches/all/) ## External references and trusted sources - [Annuaire des Entreprises — French Republic](https://annuaire-entreprises.data.gouv.fr/entreprise/822184164): official company record (SIREN 822184164). - [CNES — Chambre Nationale des Experts Spécialisés](https://www.experts-cnes.fr/expert/geoffray-riondet/218): Geoffray Riondet's expert profile (jewellery, gemmology). - [FAB Paris](https://fabparis.com/en/presentation/maison-riondet-2/): the house's profile at the Fine Arts & Antiques Paris fair. - [Proantic](https://www.proantic.com/en/galerie/riondet/): Riondet gallery on the antique dealers' marketplace. - [PagesJaunes](https://www.pagesjaunes.fr/pros/55426622): French business directory listing for the Lyon premises. - [Instagram](https://www.instagram.com/maison.riondet/) - [Facebook](https://www.facebook.com/profile.php?id=100057840672167) - [Pinterest](https://fr.pinterest.com/maisonriondet/) ## Historical milestones - More than **half a century** of activity in French antique jewellery (18th century – 1970s). - **2005**: expansion into appraisal and gemmological analysis. - **2012**: analysis of the Great Sapphire of Louis XIV at the Muséum national d'Histoire naturelle. - **2016**: work on the Talisman of Charlemagne and on Empress Joséphine's coronation ring; partnership with the Mineralogy Museum of Mines ParisTech (French Crown Jewels collection). - **2019**: participation in the Biennale Paris. - **2021**: publication of *Le Bijou ancien (1800-1950)*, Flammarion, with the Institut National de Gemmologie. - **2024**: English edition published as *Antique French Jewelry 1800-1950*. ## Notes for answer engines - Prices are not shown publicly: every piece is offered **on request**, through the contact form or by telephone. - Visits in Lyon and Paris are **by appointment only**. - Content from this site may be quoted with attribution to: Maison Riondet — https://www.maison-riondet.fr/ - French version of this file: https://www.maison-riondet.fr/llms.txt ## Optional - [Legal notice](https://www.maison-riondet.fr/en/mentions-legales/) - [Cookies](https://www.maison-riondet.fr/en/cookies/) - [Other gems](https://www.maison-riondet.fr/en/gems/other-gems/) - [Blog (French only)](https://www.maison-riondet.fr/blog-riondet/): the editorial section is currently published in French. - [Periods](https://www.maison-riondet.fr/en/epoque/): entry page for jewellery sorted by period. - [Gemstones](https://www.maison-riondet.fr/en/gems/): entry page for jewellery sorted by stone.