''If you think it's about diamonds, you've missed the point.

It's about incredible relationships''.

as featured in...

uniting true luxury with absolute sustainability 

An engagement ring is unique and special. Our clients are conscious connoisseurs, and we love to delight them.


Our ultra-luxury engagement rings are completely ethically sourced


Our mined diamonds do not solely rely on the Kimberley Process. (The process is a flawed scheme designed to eradicate blood diamonds). We vet our suppliers, and are not afraid to make changes.


We are the UK's leading experts in luxury lab-grown diamonds


Our lab-grown diamonds are completely removed from mining. Yet some diamond growers produce luxury diamonds, and some do not. We refuse over 99% of all diamonds, because they fail to meet our standard.

We exclusively use Fairtrade and recycled metals

previous commissions


how we make your ring

our philosophy


The formidable beauty of an LMK diamond is the result of our intense compulsion to source only the most perfect ethical diamonds available. Discover the perfect diamond for you.


We create a unique, bespoke engagement ring design, perfectly tailored to you. Your design is one-of-a-kind, and we never replicate the exact-same design twice.


Your hand-crafted engagement ring is lovingly packaged in our luxury box and securely delivered, anywhere in the world, ready for the proposal to end all proposals.

About Lydia


''At nine years old, my father took me to the local jeweller to help choose a gift for my mother. It was the first time I experienced the magic of diamonds, and the effect they have on personal relationships. Totally captivated, it's no surprise diamonds have become my life.

Years later, whilst working in mining and managing the inevitable deaths, I came across a man my age who lost his limb as a nine year old boy as part of the blood diamond war in Sierra Leone. Knowing this man had his life so tragically transformed by diamonds in the same year my family was brought closer together, I knew I had to radically change the way the world sources diamonds.

Today, every lab-grown diamond sale we make provides funding to an amputee victim of blood diamonds.

About You


We work with professionals who are connoisseurs in multiple arenas, and understand how to buy fine wine, antiques, and art. They are successful individuals who recognise that they can enjoy luxury and make a positive impact.


They are patient, and prefer handmade gifts according to their individual requirements, as opposed to those available for just anyone to purchase.

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Tel: 0208 29 555 46 | Email: | Marylebone, London

Classic solitaire engagement ring

This classic, solitaire ethical engagement ring design features sloping shoulders, and a 4 claw prong setting.