Fine jewelleryrevealed by light.
Maison KATERINA SIBILIA is a London fine jewellery house creating natural diamond jewels carrying deep meaning — sparkling in daylight, glowing with their own fluorescence under ultraviolet light.
A jewel that reveals itself.
Each piece is presented in a bespoke jewellery box with an integrated UV light — designed so the wearer, in private, witnesses the natural fluorescence of her diamonds for the first time.
The result is an intimate, theatrical moment that transforms the act of opening a jewellery box into a memory.
You Are My Constellation
In daylight, the ring sparkles with natural diamonds selected for their beauty, clarity and brilliance. Under ultraviolet light, the pavé reveals its own natural blue fluorescence — a hidden message written in the stone.
Katerina Sibilia
GIA Graduate Gemologist and former De Beers executive, Katerina spent over a decade inside the diamond industry before founding her own Maison.
She combines deep diamond expertise, a designer's sensibility and the craftsmanship traditions of Hatton Garden — London's historic diamond district, where the Maison is rooted.
"I wanted to create jewellery that does not just decorate, but reveals — stones with their own secret light, worn close to the skin."
My Secret Garden
Inspired by the hydrangea — a flower of nuance and transformation — the collection celebrates the many facets of femininity and invites us to believe in our inner light, and to let it guide us.
The hydrangea, in gold.
- Metal18k Yellow or White Gold
- StonesNatural Diamonds
- ChainAdjustable
- RevealNatural fluorescence under UV
18k Yellow Gold · Natural Diamonds · Adjustable length
18k Yellow Gold · Natural Diamonds
A showcase built for revelation.
For curated showcases, fairs and trunk shows, the Maison travels with a bespoke UV display case — a theatrical object designed to let visitors witness the transformation themselves, in seconds.
- — Bespoke UV vitrine for in-fair activation
- — Founder-led storytelling and client appointments
- — Press & editorial assets available on request
- — Made-to-order, ethically sourced natural diamonds
A jewellery box with its own light.
Each Maison KATERINA SIBILIA piece arrives in a jewellery box with an integrated UV light, rechargeable via USB-C, and a matching presentation bag — so the reveal can be re-lived, anywhere, anytime.
- · Jewellery box with integrated UV light
- · Rechargeable via USB-C
- · Matching KATERINA SIBILIA presentation bag
Rare by nature.
Fluorescence is the coloured glow emitted by certain diamonds when exposed to ultraviolet light — an additional natural characteristic, distinct from the traditional 4Cs.
Fewer than 10% of diamonds exhibit fluorescence. The Maison selects stones for the strength and beauty of theirs.
Learn more about fluorescence
Same stones · Ultraviolet (top) · Normal lighting (bottom)
Why the Maison matters now.
A distinctive concept
Natural-diamond fine jewellery that reveals a second identity under UV light — a category of one.
A credible founder
GIA Graduate Gemologist and former De Beers executive, based in London's Hatton Garden.
A theatrical experience
Bespoke UV vitrine and packaging turn every encounter into an editorial-ready moment.
Natural, ethical stones
Only natural diamonds, Kimberley-compliant — no synthetics, no compromise.
Made-to-order Maison
Founder-led production from Hatton Garden, ideal for curated showcases and trunk shows.
International by design
Built for press, editors and retail partners across Europe, the Middle East and Asia.
For press, fairs & retail partnerships.
The Maison welcomes enquiries from fair organisers, press, editors, stylists, buyers and retail partners — with particular attention to opportunities in Asia, the Middle East and Europe.