The Science Behind EverDear
At EverDear, we do all of our research and scientific experiments in-house. These research projects help us improve diamond quality & stability and enable us to personalise memorial diamonds in a shorter time frame and at a lower cost.
Our dedicated scientists and intellectual property (IP) make up the technical foundation of EverDear, which are our priceless assets that give us competitive advantages.
Visit Our Research Lab
We welcome families to our Santa Clarita facility from across the U.S. and around the world. Here, you can witness first-hand our custom-engineered equipment dedicated to honouring your loved one. We also offer virtual tours, giving customers a look inside our lab through video conferencing. If your journey allows, we warmly invite you to visit our California headquarters and see how memories transform into legacy.
Planning Your Visit to EverDear
We look forward to welcoming you and making your experience as comfortable as possible. If you would like to visit our main facility, please keep the following in mind:
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To ensure a dedicated member of our team is available to personally guide you and maintain safety protocols within our cleanroom environments, please contact us in advance to schedule your visit.
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While you will be responsible for your personal travel and accommodation arrangements, our local team is delighted to assist you with recommendations, directions, and planning advice to ensure your journey to our facility is seamless.
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You are welcome to personally hand over your loved one's ashes or hair to our staff during your visit. We have all the tools to measure the correct amount for you. Also, you may choose to personally collect your finished, certified diamond from our headquarters once it is completed.
How Do We Make Diamonds from Ashes?
1 Ashes and Hair Refinement Process
Carbon Extraction
Cremation diamonds are made from carbon extracted from cremation ashes or hair. The carbon in these remains must be purified to an extremely high level.
At EverDear’s laboratory, we realise that this is one of the most crucial steps in creating a cremation diamond from ashes or hair. It is at this stage of the transformation process that the colour of the diamond is decided. The level to which the cremation diamond is processed defines the colour. A cremation diamond naturally has a yellow hue due to the presence of nitrogen within hair and cremation ashes. After being purified of nitrogen, the cremation diamond takes on a bluish hue due to the presence of boron. Ashes that have been completely purified result in colourless diamonds and exude the aura of purity.
All ashes that EverDear receives are processed by heat in a vacuum environment and are purified through various refinement processes depending on the desired colour. The carbon content in everyone’s hair or ashes is different, so the results are unique for each.
2 HPHT Growth Process
Diamond Crystallisation
Natural diamonds are formed underground when the element carbon is subjected to both extreme amounts of pressure and excessively high temperatures. A High Pressure, High Temperature (HPHT) press is used to artificially simulate the natural environment in which carbon is transformed into a diamond. In this case, the carbon from ashes is transformed into a beautiful cremation diamond.
To create the cremation diamond, a tiny diamond seed is prepared and placed at the bottom of the press’s inner core cube. The interior of the press is heated to over 3000–5000°F, melting a catalyst metal. The molten catalyst metal dissolves the high-purity, personal carbon source, which is then transported to the small diamond seed and crystallised. A cremation diamond is born and starts to grow like a shining star.
3 Diamond Polishing Process
Cutting & Polishing
Once a cremation diamond is created, it is raw and uncut, showing none of its true beauty and splendour yet. To coax out its true potential, our expert artisans polish the cremation diamonds. First, the cremation diamond undergoes “crosswork”, in which the main facets are placed on the diamond. This ensures maximum weight, clarity, and the best angles for the specific diamond shape. Next, the diamond’s main facets are smoothed, also known as polishing. Lastly, the final facets are polished onto the diamond. The facets added are the stars, top and bottom halves also known as upper and lower girdle facets. This process has largely stayed the same for hundreds of years. However, our artisans use the latest tools to ensure precision work.
The Chain of Custody & Individual ID System
Transparency and precision are the pillars of the EverDear creation process. Because every memorial order represents a unique, deeply personal story, we have established an advanced tracking and safety ecosystem that goes far beyond industry standards. From multi-layered Partition IDs and unique barcode mapping to rigorous two-person cross-checks, discover how our strict Standard Operating Procedures (SOP) guarantee an unbroken chain of custody and absolute peace of mind throughout this months-long journey.
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We understand that entrusting us with your loved one's remains or hair requires immense courage and a profound leap of faith. Our commitment to honouring this trust goes far beyond the science of diamond creation; it is embedded in a rigorous, uncompromising tracking ecosystem that guards your loved one every single second they are in our care. To give you complete peace of mind, we have designed a multi-layered identification framework that tracks every unique element of your order, ensuring total transparency from the moment your collection kit arrives at our facility to the day your finished diamond is delivered to your doorstep.
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Every family we serve has unique wishes. Some choose to create a diamond from cremation ashes, others from hair, and many request specialised combinations—such as blending a portion of ashes with hair samples from multiple family members. To seamlessly manage these deeply personal requirements, our system goes much deeper than a standard customer Order ID. The moment your package is received, our advanced Enterprise Resource Planning (ERP) platform generates an intricate web of individual Partition IDs and unique QR codes. Every separate material—whether it is raw ashes, distinct bundles of hair, purified carbon powder, rough diamonds, or unmounted jewellery settings—is assigned its own tracking label. This digital footprint ensures that every single component is instantly identifiable and mapped to your exact specifications, making it virtually impossible for materials to be misplaced or confused.
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Creating a memorial diamond is an intricate journey that spans several months. At any given moment, our dedicated scientists are managing hundreds of custom orders from all over the world, each with its own specific technical demands. To ensure absolute precision across this multi-stage timeline, we operate under a strict Standard Operating Procedure (SOP) forged from decades of collective lab experience. Every single phase—from secure, climate-controlled storage to the high-temperature extraction labs and crystallisation presses—requires a formal hand-over. When a batch moves from one step to the next, the exact start and end times are digitally logged, and the technicians responsible are recorded. To eliminate human error, all critical transitions and key verification steps require a mandatory two-person cross-check. This double-authentication is permanently archived in our system, providing an unbroken chain of custody and full retrospective traceability. Furthermore, these data logs allow our management team to continuously analyse lab workflows, identify operational bottlenecks, and optimise the timeline for all families.
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We believe that safety lies in constant verification. Throughout the creation process, our team continually cross-references every technical step back to the primary source: your original order form and the wishes you have shared with us. To reinforce this, EverDear has built an automated auditing system that checks the lab logs for your order against your documented specifications at each stage. If the system detects even the slightest discrepancy between your stated wishes and the work recorded in the lab, it instantly raises an internal "Red Flag." This immediately halts the specific process and triggers a mandatory manual intervention. Our senior staff will double-check the details and, if necessary, contact you directly to clarify or confirm your wishes. We leave nothing to chance, ensuring your diamond is crafted exactly as you envisioned
Research & Development
EverDear values research and development and recognises the importance of intellectual property protection. The detailed technical process of turning ashes into diamonds and its applications are strictly safeguarded and maintained in absolute confidentiality.
Respecting What Families Choose to Keep
Many families wish to keep a portion of their loved one's ashes at home or share them among multiple relatives, making the amount of remains required a deeply sensitive issue. EverDear can successfully craft a memorial diamond with as little as 100 grams of cremation ashes or 2 grams of hair.
This material efficiency is achieved through two core technological advantages:
High-Yield Chemical Extraction
Developed through years of laboratory refinement, our proprietary chemical protocols maximise the recovery rate of usable carbon from the provided biological sample. By minimising carbon loss during the initial refinement stage, we ensure that a smaller amount of starting material yields a sufficient volume of high-purity carbon needed for diamond growth.
Exceptional Pressure and Thermal Stability
At the heart of our innovation is our proprietary HPHT diamond growth press, fully designed, engineered, and owned by EverDear’s in-house engineering team. Its exceptional stability comes from a proprietary multi-layer anvil system, in which a pyramid-shaped inner assembly is enclosed within an 8-anvil spherical structure and precisely compressed by two opposing cylindrical presses. Inspired by the Earth’s own deep interior, this spherical architecture creates a highly balanced and uniform pressure environment that more closely replicates the natural conditions under which diamonds form deep within the Earth.
Precision-Engineered HP Capsules
We do not rely on standard, commercially available diamond presses from third party suppliers. Traditional machines use oversized growth chambers, often 500 to 600 mm in outer diameter, requiring large amounts of unnecessary carbon to grow a 6 to 20 mm rough diamond. In contrast, our custom built HPHT presses use a compact, engineered synthesis capsule with a 300 mm outer diameter and a targeted 20 to 30 mm growth zone. This superior pressure transmission and compact containment deliver a much higher structural conversion rate, ensuring that a smaller amount of your loved one's carbon is utilised with maximum efficiency and lower waste.
Why Our Technology Lowers Your Cost
Our pricing advantage is built on three verifiable operational pillars:
In-House Production & Equipment Engineering
Early on, we made a strategic decision not to rely on third-party-developed machines. EverDear designs, builds, and continuously maintains its own fleet of High-Pressure High-Temperature (HPHT) diamond-growing presses. Because we own the intellectual property and maintain full-spectrum capabilities—from raw carbon purification and catalyst formulation to synthesis block fabrication—we have eliminated the steep middleman mark-ups and third-party dependencies that inflate costs elsewhere.
The Physics of Faster, Higher-Yield Growth
Our technical advisers, including a university professor with over 25 years of expertise in high-pressure materials science, have helped us engineer a proprietary remastered catalyst formula and upgraded synthesis capsules. Our custom presses feature approximately 50% more internal growth volume and operate at superior temperature and pressure stability. This allows our diamonds to grow roughly 30% faster with higher yields and less waste product during polishing. By using less energy and time per carat weight, our operational cost per diamond is reasonably reduced.
Global Scale, Longevity, and Cumulative Innovation
EverDear has been serving families for a decade, building on research and diamond synthesis expertise developed over the past 20 years. As one of the pioneers in the memorial diamond field, we’ve continuously refined our technology, equipment, and processes over that time.
Today, families across the US, Canada, the UK, Japan, Australia, and more than 50 countries trust us to create memorial diamonds for their loved ones. Our long-standing experience, established technology, and global scale allow us to operate efficiently and offer exceptional value—without compromising on quality, consistency, or care.
Quality Is an Absolute Constant
An accessible price never dictates a lesser diamond. The physical, chemical, and optical properties of an EverDear diamond are identical to those of a high-quality natural diamond. Our affordability is a byproduct of efficiency, whereas our quality is the result of precise control over every physical and chemical variable in our laboratory:
In-House Catalyst Synthesis
To eliminate impurities at the atomic level, we formulate and smelt our proprietary catalyst mixtures in-house using top-tier, digitally controlled furnaces manufactured in Germany. This gives us absolute control over the catalyst’s composition before it ever enters a press.
Total Environmental Stabilisation
External fluctuations can easily compromise diamond clarity. To protect our HPHT presses, our laboratory utilises a dedicated Environmental Control System (ECS) to maintain constant ambient room temperature and humidity. Concurrently, the temperature, flow rate, and pressure of our hydraulic fluids and internal cooling water loops are kept perfectly static.
Meticulous Parts Quality
The zirconium dioxide used to press our HP synthesis capsules is stringently vetted by our laboratory team. We analyse every single batch to guarantee that particle size, material purity, and trace element profiles remain perfectly uniform and reproducible. Before a cycle begins, every potential contaminant is scientifically purged from the capsule environment.
By standardising these microscopic variables, we maximise the repeatability of our experimental conditions. This attention to detail ensures that under our precise temperature-and-pressure configurations, every diamond crystal grows flawlessly. As a result, EverDear diamonds consistently achieve clarity grades in the VVS1 to VS2 range*—completely eye-clean and pristine even under 10x gemmological magnification.
To ensure absolute objectivity, our quality control does not rely solely on our internal validation. Every EverDear memorial diamond can be independently graded and certified by the International Gemological Institute (IGI), verifying its clarity, colour, and authentic diamond structure through an independent, globally recognised authority. For us, advanced technology is simply the vehicle we use to deliver a flawless, everlasting legacy to your family.
*Final diamond clarity may vary depending on the individual growth conditions and characteristics of each crystal.
At EverDear, we are at the cutting edge of innovation in the cremation-diamond-from-ashes market. Through our technological innovation, we are able to deliver the highest quality diamonds from the ashes of the dearly departed at the most affordable cost.
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