Commissioned for engagements, marriages and the founding of a family line —
two carbon signatures, or several generations of them, fused within a single
diamond.
The premise
One stone. Two histories.
Most engagement stones are chosen. A Union stone is derived — grown from the
physical substance of the two people it binds.
Roughly half the mass of human hair is elemental carbon, assembled by your own
body over months of living. CEPHI isolates that carbon from each partner’s
clippings and introduces it, together, into a single diamond seed matrix. The
two signatures do not sit side by side; through Lineage Matrix processing they
are distributed through the growing lattice, bound at the atomic level as the
crystal forms.
The result is a diamond in the fullest sense — identical in optics, hardness
and chemistry to a mined stone, gradable under the same universal metrics —
whose raw material is the union itself.
Configurations
Pairs, and lines of descent.
The pair
The founding configuration: both partners contribute clippings, gathered by
their own stylists during routine appointments and combined within one
Repository Capsule — or two, if schedules diverge. Five grams in total is
sufficient; the division between partners is yours to decide.
The lineage
For anniversaries, vow renewals and generational commissions, material from
parents, children or grandparents may be fused into a single founding stone —
a physical consolidation of a family line. Each contributor is recorded on the
Certificate of Biological Origin.
The set
A single harvest can seed multiple stones: a principal engagement diamond and
matched secondary stones for bands or heirloom pieces, all grown from the same
registered sample.
The stone
Defined at consultation.
Carat ambition, colour, cut and setting are established in your private
consultation and fixed in the commission dossier. Colourless stones are grown
in nitrogen-controlled conditions; fancy colours — the blues, yellows and
champagnes — are achieved through trace-element chemistry and post-growth
treatment, described plainly in the science.
Finished stones may be delivered loose, or set by our master jewellers in
platinum or gold to your specification. Independent gemological grading is
included with every stone.
Pricing by enquiry only · defined by carat, colour and setting
Reference forms
Points of departure, not products. Every setting is drawn bespoke at
consultation; these five forms give the conversation a place to begin —
adjusted, combined, or left entirely behind.
I
The Classic Six-Prong
A single round brilliant held high in six slim claws on a clean, even band — the most enduring engagement silhouette.
II
The Four-Prong Solitaire
The archetype: four prongs on a smooth comfort-fit band. Nothing competes with the stone — the cleanest of the selections.
III
The Pavé Four-Prong
A slender knife-edge band set with pavé diamonds along both shoulders — added brilliance without crowding the centre stone.
IV
The Split-Shank Crossover
Below the stone the band divides into two strands that cross over one another — a contemporary silhouette with an open, airy gallery.
V
The Oval Old Mine Cut
An antique-style oval old mine cut with soft candlelight facets, set lengthwise on a slim tapered band. A romantic, heritage alternative.
VI
The Cushion Halo
A cushion cut ringed in pavé within a slim halo, the band set to the shoulders — soft geometry, amplified presence. Shown in rose gold.
VII
The Bezel Emerald
An emerald cut held in a full bezel on a clean rounded band — architectural, quiet, entirely modern. The step facets read as calm depth rather than sparkle.
Begin from a form, a sketch, an heirloom — or from nothing at all.
Every commission is drawn for its client.
Bespoke details
The quietest work is hidden. Each detail is specified at consultation and
recorded on the commission dossier.
The Hidden Halo
A concealed circle of stones set beneath the crown, visible only in profile — pavé diamonds, or a colour that answers a private meaning: a birthstone, an anniversary, a companion stone grown from the same capsule.
The Undergallery
A row of pavé diamonds set along the under-bridge of the band, directly beneath the stone — invisible from above, revealed only in profile. Shown in white gold.
The Concealed Stone
A single bezel-set stone mounted on the underside of the head, directly beneath the diamond, facing the finger — a private stone only the wearer knows. Shown with a ruby.
The Embedded Stones
Diamonds or coloured stones flush-set into the inner surface of the band, worn against the skin. Invisible on the hand; certain to the wearer. Shown with three flush-set diamonds; a graduated line of sapphires by arrangement.
The Engraved Sequence
The alphanumeric sequence from your Certificate of Biological Origin, hand-engraved inside the band — the stone's registry, carried on the body rather than filed in a drawer. Included with every ring commission.
Reference
A guide to size, proportion and metal — settled precisely at consultation.
Carat size · on a size-6 finger
Carat measures weight rather than diameter, so the visible step between sizes
is more gradual than the numbers suggest. Shown from 0.5 to 3 carat as a guide
to how each weight wears.
Band width
A finer 1.5 mm band emphasises the diamond and reads delicate; a broader
3 mm band feels more substantial. Width is adjusted within each setting's
range at consultation.
Metal · white, yellow & rose
The same design reads differently in each metal: white metals recede and
emphasise the diamond, yellow gold lends warmth and a classic register, rose
gold a softer, contemporary tone. Metal never affects the composition of the
stone itself.
Begin
Commission a Union stone.
A private consultation with our concierge — in writing or by video — defines the stone and opens your dossier.
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