Memorial Diamonds from Ashes & Hair — for Loved Ones and Pets
The carbon that once gave life to someone you love — human or pet — carefully extracted, purified, and crystallised into a real, IGI-certified diamond. To be worn, held, and passed down through generations.
Carbon — the building block of all life.
Every living being — human or animal — is built on carbon. Bone ashes contain approximately 3–9% carbon; hair contains 45–50% carbon. This carbon — the literal substance of a life once lived — is the raw material from which your memorial diamond is grown.
Diamonds are the purest crystalline form of carbon. By isolating and purifying the carbon from these remains and crystallising it into a diamond lattice, we are not creating something artificial. We are revealing the most perfect form that carbon can take.
Three stages, seventeen meticulous steps.
Our Chemical Vapor Deposition process builds your diamond one atomic layer at a time — in a clean vacuum environment, without metal catalysts.
"Before a diamond can be grown, the carbon held within the ashes or hair must be carefully isolated and purified."
Labelling & Tracking
Each sample is assigned a unique identification code at the moment it arrives. That code follows the material through every subsequent step, allowing full traceability from ashes to finished diamond.
Grinding
The ashes are milled to a fine, uniform consistency. This greatly increases the reactive surface area, which is essential for thorough chemical purification.
Chemical Purification
Calcium phosphate and other mineral compounds present in bone ash are removed through a controlled chemical process, isolating the pure carbon from everything that is not carbon.
High-Temperature Treatment
The purified carbon is heat-treated in an oxygen-free environment. This prevents oxidation, which would burn the carbon away, and ensures maximum purity going into the growth phase.
Vaporisation
Finally, the purified carbon is converted into a gaseous form — the feedstock that will be introduced into the CVD reactor in Stage 2.
"The heart of the process — where the carbon is transformed, atom by atom, into a real diamond crystal."
Seed Preparation
A high-purity diamond seed crystal is placed inside a sealed vacuum chamber. This tiny seed acts as the template onto which the purified carbon will be built.
Carbon Gas Introduction
A precisely controlled mixture of carbon-rich gases, derived from the purified source, is introduced into the chamber at low pressure.
Plasma Activation
High-energy microwave plasma is generated inside the chamber. The plasma breaks down the gas molecules and releases free carbon atoms ready to crystallise.
Layer-by-Layer Growth
The released carbon atoms settle onto the seed crystal and arrange themselves into a perfect crystalline lattice — one atom-thick layer at a time. The same atomic structure as a mined diamond.
Controlled Duration
Growth continues for several weeks to several months. The exact duration depends on the target carat weight, colour, and other specifications of your stone.
Post-Growth Treatment
The chamber is gradually cooled and the raw diamond is carefully removed. At this stage the rough stone may show a brownish tint — normal for newly grown CVD diamonds, addressed during cutting.
"A rough diamond is not yet a gemstone. The final stage is the work of master craftsmen."
Marking
Expert craftsmen study the rough stone's internal structure and identify the optimal cutting planes — the orientation that will produce the best combination of size, clarity, and brilliance.
Scanning
High-precision 3D scanning maps the stone's internal composition in detail, including any natural inclusions that need to be avoided or worked around.
Design
A cutting plan is finalised, balancing weight retention, optical performance, and your preferences for shape and finish.
Laser Cut
High-energy laser technology executes the cutting plan with micron-level precision and without introducing stress fractures into the stone.
Hand Polish
After preliminary shaping, the diamond is hand-polished by master craftsmen. This is where the stone develops its final brilliance and fire.
Quality Control & IGI Certification
The finished diamond is graded against the international 4Cs — Colour, Clarity, Cut, and Carat Weight — and submitted to IGI for independent certification before delivery.
Your memorial diamond.
Available diamond sizes
Choose the carat weight that's right for youLarger sizes require additional growth time and a proportionally greater quantity of carbon source.
Carbon source
Your finished piece
Graded on the colourless-to-tinted scale. CVD diamonds available across a range of natural colours.
Assessed under magnification. CVD's clean growth produces naturally fewer inclusions than HPHT.
Shaped and hand-polished by master craftsmen. The cut determines how light returns to the eye.
From 0.5 to 3.0 carats. Choose the weight that feels right for your tribute.
Every diamond, independently verified.
Every memorial diamond we create is submitted to the International Gemological Institute (IGI) for independent grading and certification. You receive both the diamond and the report — the same gold standard used across the global diamond trade.
- Independent grading by IGI's accredited gemologists, the same body trusted by the global diamond trade.
- Each report documents the 4Cs — Colour, Clarity, Cut, and Carat Weight — measured to laboratory standard.
- IGI verification confirms that your stone is a real diamond, chemically and optically identical to mined diamonds.
- A unique IGI report number is paired with our internal traceability code, linking your finished stone to the original sample.
International
Gemological Institute
Every MadisonDia memorial diamond is independently graded and certified by IGI.
From first contact to finished diamond.
We walk with you through every step. There are no rushed conversations when it comes to honouring someone you love.
Confirm Order
Contact our team to begin. We guide you through every option — carat size (0.5 to 3.0 ct), colour, cut, and setting — and handle all paperwork with care.
Collect Carbon Source
Deliver ashes or hair to us in person, or via secure verified courier. Each parcel is logged on arrival and given its unique traceability code.
Extract Carbon
Our laboratory purifies and extracts the carbon using the physical and chemical processes described above.
Grow Diamond
Carbon atoms are deposited layer by layer inside our CVD reactor over several weeks to months, forming a perfect crystal lattice.
Cut & Polish
Master craftsmen shape the diamond to your chosen specifications and hand-polish the stone for maximum brilliance.
IGI Certification & Delivery
The finished stone is submitted to IGI for independent certification. It is then delivered to you with its full report and traceability documentation.
Frequently asked questions.
Keep your loved one close, forever.
Every memorial diamond is unique — as unique as the life it honours. Reach out to our team and we'll walk you through the entire process with patience and care. There are no rushed conversations, and no obligation to proceed.