About Us

Jewels from the Heart of London 

Nestled in the bustling streets of Londons jewellery district, Hatton Garden, KJJ serves those in the know with an ever changing collection of beautiful jewels. Our eclectic collections are shaped by the vibrant rhythms of London, from antique jewels hallmarked within the city centuries ago, to great vintage pieces, to our new made in house collections and our dedicated diamond department, kjj.diamonds our pieces all reflect the city we’re from, with its rich, centuries old jewellery reputation.


Katherine Guest - The city of London was pivotal in my own personal obsession with jewellery. Born and raised in a suburb of London, a passion for jewellery was ignited on the school playground at pickup time. It was the high 1980s, in Wimbledon, when waxed jackets, Alice bands, big hair, and bigger jewellery reigned supreme. The colour, scale, and the sheer theatre of some of the pieces being worn on the school run sparked a passion that has grown over the decades and turned me from admirer, to collector, to the founder of the KJJ you see today.