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Online jeweller RenéSim and Maximilian Hemmerle's 180 years of family tradition

RenéSim - Europe's first online jeweller in the exclusive luxury sector - combines the advantages of modern e-commerce with 180 years of family tradition of the company's co-CEO, Maximilian Hemmerle:

Maximilian Hemmerle, one of RenéSim's two founders, represents the fifth generation of his family in the jewellery business, continuing 180 years of family tradition. His grandfather, René Sim Lacaze, was one of the most influential jewellery designers of the 20th century and inspired the name of RenéSim.

René Sim Lacaze spent many years in Paris in leading design positions with companies including the renowned luxury jeweller Van Cleef & Arpels. He designed jewellery creations for major names such as Cartier and Mauboussin and for clients including Marlene Dietrich and the Duchess of Windsor.

The father of Maximilian Hemmerle, the goldsmith, jewellery designer and jeweller Franz Hemmerle, was co-owner of the exclusive jewellery store Hemmerle in Munich's Maximilianstrasse and presided for more than 33 years over the rise of the store as one of Europe's premier addresses for luxury jewellery.

After leaving the family company, Franz Hemmerle spent several years in the management team at Bulgari. Today, the highly respected jewellery designer works with his son Maximilian to design individual pieces and exclusive collections for RenéSim.

As the fifth generation of jewellers in the family, Maximilian Hemmerle is continuing a long and eventful tradition with the Internet store.

The names of Franz and Maximilian Hemmerle are synonymous with individual jewellery to the highest quality. The jewellers are delighted to create personal masterpieces for every customer upon request.

Thanks to RenéSim's exclusively Internet-based business model and network of partners and suppliers built up over generations, the company is able to offer premium-quality jewellery at good prices.

RenéSim supplies exclusive jewellery in unique designs by master jewellers, produced using traditional craftsmanship methods by Germany's finest goldsmiths.


René Sim Lacaze,
Paris, 1937

Memoirs of René Sim
Lacaze, 1993

Franz Hemmerle, 2010

Design by
Franz Hemmerle, 1997

Maximilian Hemmerle, 2012

Ebony ring with
diamond, 2011

cocktail ring

Individual designs by
master jewellers


Would you like to receive personal advice or order a custom design? Contact us!


Online portrait: RenéSim provides discerning customers with supreme quality and superb service. High-class jewellery at online prices.



Our new advertising campaign skilfully turns the spotlight on exquisite coloured gemstones and custom-designed pieces. The campaign can be seen in media including VOGUE, GQ and AD.


RenéSim. Also profiled in the media:

Vogue Süddeutsche Zeitung InStyle GQ Elle

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renesim GmbH

Branch office (appointment only):
16 Hanover Square, Mayfair
W1S 1HT London, United Kingdom
T +44 20 351 466 05

Amiraplatz 1, D-80333 Munich
T +49 89 1222 893 0

Hours Mon - Fri 8 am - 6 pm


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As an online jeweller, RenéSim combines the benefits of a modern online-based business model with 180 years of family-run traditional craftsmanship in the jewellery industry. Gemstones such as diamonds are the central focus at RenéSim; we supply high-quality, thoroughly individual pieces such as engagement rings in addition to loose diamonds. We offer unique diamond post earrings, diamond rings, memory rings, engagement rings and much more. Consult the jewellery experts at RenéSim!

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