Top Memorial Diamond Manufacturers: A B2B Buyer's Comparison (2026)

Introduction: A Buyer's Map of a Consumer-Facing Industry

If you run a pet-memorial brand, a funeral home network, or a cremation jewelry line, you have probably noticed something odd about the memorial diamond industry: almost everything written about it is written for grieving families, not for buyers. That is understandable. The public-facing companies in this space are consumer brands, and their websites speak to individuals. But it leaves a real gap when you are trying to answer procurement questions. Who actually manufactures? Who will put your logo on the packaging? What is a realistic turnaround for wholesale volume, and what does the retail pricing you see online imply about manufacturing cost?

This comparison is written for the buyer side. We profile five established memorial diamond companies — Eterneva, Algordanza, Lonité, Heart in Diamond, and Semper Fides — using only what each company states on its own website, and then we include our own operation, BioGem Lab, under the same scrutiny. Every figure below is sourced to an official company page and listed in the references. Where a company does not publish a figure, we say so rather than guess, because in this industry an unsourced number is usually a marketing number.

One structural fact frames everything that follows: of the six companies compared here, five sell directly to end customers, and only one manufactures exclusively for other companies' brands. That asymmetry is the single most useful thing to understand before opening any commercial conversation in this market.

The Comparison Table

A cross-check worth stating explicitly: all five consumer-facing companies process human cremated remains. BioGem Lab processes hair and pet fur only and does not accept human remains or human cremated ashes — a deliberate regulatory and positioning choice that materially simplifies cross-border logistics for partners.

Eterneva

Eterneva is the most visible consumer brand in the category, and the most heavily capitalized. The company is headquartered at its own diamond lab in Kerrville, Texas — which it describes as the largest memorial diamond facility in the United States — with additional growth capacity in Europe [1]. Its public positioning rests on process transparency for families: customers can book a tour of the Texas lab, and Eterneva publishes third-party carbon-content analyses of cremated remains, hair, and aquamation ashes conducted with external testing organizations [1][4].

On commercial specifics, Eterneva is unusually transparent for a consumer brand. Pricing is published by carat size and is flat across its eight colors — blue, light blue, yellow, colorless, black, red, green, and pink — from $3,499 for 0.25 ct to $75,000 for 5 ct, with financing available [2][4]. The published production timeline is 8 to 11 months from receipt of ashes or hair to delivery of the finished diamond [2]. Finished stones are submitted to IGI for third-party grading before setting [3]. Eterneva accepts ashes, hair, aquamation remains, and — unusually — carbon sources such as cotton clothing and handwritten letters [4]. Material requirements are modest by industry standards: roughly half a cup of ashes or a packed cup of hair [3].

From a B2B standpoint, Eterneva is a brand competitor rather than a supplier. There is no published wholesale, white-label, or OEM program anywhere on its site, and its differentiators — Shark Tank and celebrity visibility, grief-journey marketing, the disclosed eight-figure lab investment — are consumer acquisition assets, not procurement features [1].

Best for: families who want a high-touch, transparently documented US consumer experience.
Not for: brands seeking white-label supply, colored-diamond wholesale, or any sub-90-day turnaround.

Algordanza

Algordanza is the oldest name in this comparison. The Swiss company has produced memorial diamonds since 2004 at its own manufactory in Domat/Ems, Switzerland, and it built the scientific vocabulary the rest of the industry now uses [5]. Two things still distinguish it technically. First, it grows only natural blue shades — the coloration comes from boron present in the source carbon — and performs no post-growth color treatment [5]. Second, it takes a public, quantified stand on carbon integrity: Algordanza requires at least 500 g of cremation ashes or 5 g of hair, and states plainly that any company requiring less than that is adding generic carbon to the process [6]. For a B2B buyer evaluating any manufacturer, that sentence is the most useful single sentence on any competitor's website.

Commercially, Algordanza publishes a starting price of €4,240 for a 0.4 ct rough diamond, with cut options including brilliant, emerald, Asscher, princess, radiant, and heart [5]. The production process is documented before a notary, and the company holds memberships in the Swiss, European, and international funeral federations (SVB, EFFS, FIAT-IFTA) [5]. Crucially for trade buyers, Algordanza is the one consumer brand here with a structured channel program: it operates a funeral-director partner area, a dedicated offering for funeral homes, and the ALGORDANZA Academy for industry training [5]. That is a retail partnership model — partners refer families and are supported locally — not manufacturing white-label. Diamonds are delivered under the Algordanza name with the company's own certificate, with an independent GEMLAB certification option [6][7].

Algordanza does not process pet remains in-house; pet inquiries are referred to Semper Fides, its R&D partner and de facto pet subsidiary, whose specifications are covered below [6]. The human-line production turnaround is not published on the company website.

Best for: funeral homes seeking a Swiss-branded partner program with documented scientific rigor.
Not for: brands that need yellow or colorless inventory, North American production, or their own label on the product.

Lonité

Lonité is a Swiss brand with a formal US operation. Its American site explicitly markets the service of turning human cremation ashes into diamonds "for individuals in the USA and Canada," run from a Buffalo, New York office, with customer meetings also offered in New York City and an invitation to tour the Swiss laboratory [10]. The European site lists offices in Berlin and Zürich alongside the Swiss lab [11].

On specifications, Lonité publishes the lowest entry price in this comparison — from $1,400 for a 0.25 ct diamond — alongside a $150 welcome kit that is credited toward the order [10]. The company makes strong purity claims: 99.99% (4N) carbon purity, roughly 5,000 minutes of purification, 25 checks across seven inspection points, and HPHT growth on a natural diamond seed with no CVD step [10]. Certification is described as being issued "by renowned institutes like the IGI" [10]. Published material requirements are 5 oz / 150 g of cremation ashes, or 0.2 oz / 5 g of hair [10]. A pet-memorial line is offered through the European site [11].

The number that matters most for procurement is the one Lonité states plainly on its homepage: the process takes 12 months [10]. That is the longest published consumer timeline in this comparison, and it reflects the same one-family-at-a-time production model its consumer peers use. No wholesale, white-label, or OEM program is published. For a B2B buyer, Lonité's main utility is as a retail price anchor at the entry level of the market.

Best for: benchmarking consumer entry-level pricing.
Not for: buyers needing a 60–90 day wholesale cycle or private-label documentation.

Heart in Diamond

Heart in Diamond, founded in 2005, is the most price-transparent company in this comparison and the most permissive on carbon sources. It publishes a complete USD price table by carat and color — from $1,770 for a 0.10–0.19 ct orange-yellow stone to $36,990 for a 3 ct white diamond — across seven colors: orange-yellow, yellow-green, purple, blue, white, pink, and black [12]. The company operates its own HPHT production facility, which it describes as in-house from carbon processing through growth [12].

The published terms read like a wholesale price list that escaped into retail. Standard cuts are brilliant, princess, and radiant; emerald carries a 10% surcharge, oval 20%, and pear or marquise 30% [12]. Each diamond ships with the company's own certificate of authenticity; an independent gemological laboratory report is available as an optional add-on rather than a standard inclusion [12]. On carbon sources, Heart in Diamond accepts cremated ashes, hair, pet fur, clothing fragments, and — uniquely in this comparison — paper sources such as letters and book pages [12].

Two gaps matter for a procurement evaluation. No production turnaround is published on the site, and no B2B, wholesale, or partnership program is listed — the company sells to individuals through a published retail matrix, full stop. The US toll-free line is the primary published contact [12].

Best for: buyers who want a published retail price matrix from which to model their own markup scenarios.
Not for: buyers requiring standard third-party grading or a stated production lead time.

Semper Fides

Semper Fides — Latin for "forever faithful" — is the pet-only specialist in this comparison, and the closest structural analog to what a pet-memorial brand actually needs, with one decisive difference. The Swiss manufacturer, active since 2006, produces memorial diamonds exclusively from animal sources: cremated pet ashes, hair, fur, and feathers [8]. It works closely with Algordanza on research and development and is described by Algordanza's own regional sites as its pet-line partner and subsidiary [6][7].

Its published specifications are the most partner-friendly in the consumer field: a 4–9 month average turnaround, 0.25–1.0 ct range, cuts from brilliant and emerald to princess with surcharges for non-standard shapes, and a starting price of €2,290 [7][9]. Minimum source material is 300 g of ashes or 5 g of hair or feathers [8]. Semper Fides is categorical about carbon integrity — no generic carbon is added from external sources, and the company states that if a customer has less than the minimum material, options exist but the diamond's uniqueness is preserved without outside carbon [8]. Certification includes the company's own documentation, with an independent GEMLAB option [7].

The structural difference is the sales model. Semper Fides sells under its own name to end customers through a partner network of crematoriums and pet-service businesses across Europe — its site directs customers to choose a trusted Semper Fides partner, meaning partners distribute a branded product rather than manufacture behind a partner's brand [8]. And it processes cremated pet remains, which not every partner market wants to handle in its import workflow.

Best for: European pet crematoriums seeking a branded pet-diamond partner program.
Not for: brands wanting white-label supply, or markets that exclude cremated remains from cross-border logistics.

BioGem Lab

We include ourselves under the same standard, including the limitations. BioGem Lab is a China-based HPHT manufacturer in Luoyang, operating its own press fleet and supplying exclusively B2B — white-label and OEM production for pet-memorial brands, funeral businesses, and jewelry lines. There is no consumer storefront and no published retail price list: wholesale pricing is quoted per program after a scope conversation, and there is no minimum order quantity, because the production model is standardized colorless growth rather than one-customer-at-a-time custom work.

The published production turnaround is approximately 60 days. We specialize in colorless diamonds in the E–H range and do not produce treated colors, which keeps the product inside the grading range conventional jewelry supply chains already know how to price. Traceability runs through CCIC (China Certification & Inspection Group) inspection and labeling, and our carbon pre-extraction method is covered by issued Chinese invention patent ZL 2010 1 0565778.9, which partners can verify independently in the patent record rather than take on our word.

Our limitations, stated plainly, because a comparison article that hides its own author's constraints is an advertisement, not a comparison. We do not make colored diamonds — no blue, no yellow, no black. We do not process human cremated remains or human hair; our source material is pet fur, animal hair, and other non-human biological carbon, which is a deliberate choice that keeps our partners' regulatory surface small. And we are a manufacturer, not a consumer brand: partners own the end-customer relationship, set retail pricing, and build their own brand equity, while certification documents follow the issuing laboratory's standard format.

For buyers, the structural point is that a manufacturer and a brand are not competing offers — they are different layers of the supply chain. Four of the five companies above are, from a pet brand's perspective, potential competitors for the end customer. A white-label manufacturer has no consumer presence and therefore no channel conflict with the brands it supplies. That is the gap this comparison exists to document.

Best for: brands that want a manufacturing partner rather than a competing retail brand — private-label packaging, no MOQ, ~60-day replenishment.
Not for: businesses built on colored memorial diamonds or human-cremains services. If your model needs those, Algordanza, Eterneva, or Semper Fides are the right conversation, and we will say so ourselves.

How to Choose

Four questions separate this list quickly, and they are best asked in this order, because each eliminates more than the last.

Do you need a supplier or a brand to resell? Four of the five companies profiled here are consumer brands. Algordanza and Semper Fides operate partner networks, but those are referral and retail-distribution partnerships under their own trademarks — the partner's name never appears on the diamond or the certificate. If your business model depends on your brand being the only name the end customer sees, a white-label manufacturer is the only structure that preserves it. If your model is local service with a trusted product attached, a partner program like Algordanza's funeral-director network is a legitimate and lower-effort path [5].

What does your market allow? Every company in this comparison except BioGem Lab processes human cremated remains. Regulatory, import, and cultural constraints in many markets make hair- and fur-only manufacturing materially easier to operate across borders — there is no human-remains handling anywhere in the chain, which simplifies documentation, insurance, and partner training. Semper Fides and Lonité both run pet lines alongside human lines [8][11]; a buyer should decide deliberately whether one supplier serving both markets is an advantage or a compliance liability for their positioning.

What is your color strategy? Only two technical positions exist in this list: natural-as-grown colors — Algordanza's blues, yellow where nitrogen is present, Semper Fides' blue-white — and treated or post-growth colors, which cover most of the rainbow at Eterneva, Heart in Diamond, and Lonité [2][4][12]. Colorless-only manufacturing is its own niche, and a defensible one, because it is the range conventional jewelry supply chains already grade, price, and insure without education overhead.

What lead time does your cash flow need? Published consumer turnarounds run from 4–9 months (Algordanza's pet line [7]) to 8–11 months (Eterneva [2]) to 12 months (Lonité [10]). Heart in Diamond does not publish one [12]. A 60-day manufacturing cycle changes what a brand can promise its own customers, but only if the manufacturer will put the cycle in writing with late-delivery terms — ask any prospective supplier, including us, for exactly that.

Whatever the answers, the diligence layer is the same: our factory audit checklist turns these four questions into a 30-point questionnaire, and our guide to ash and hair quantity requirements explains the carbon-mass science behind the minimums each company publishes.

Frequently Asked Questions

Conclusion

The memorial diamond industry presents itself to the world as a set of consumer brands, and on the evidence of their own websites, that is exactly what five of its best-known names are. They differ on color philosophy, price transparency, and timeline candor — Algordanza's natural-blue purism, Heart in Diamond's published matrix, Lonité's stated 12 months, Eterneva's grading transparency, Semper Fides' pet specialization — but none of them publishes a wholesale or white-label program, and all of them process human cremated remains.

For a B2B buyer, the practical conclusion is not that one of them is the best. It is that the comparison itself reveals a structural gap: brands that need a manufacturer — not another brand — have exactly one name on this list that fits, and it is the one writing this article. We would rather be compared on sourced facts than discovered by default, which is why every figure above carries a reference, including the ones that are inconvenient for us.

If you are evaluating memorial diamond supply for a pet-memorial brand, start with the audit checklist, verify the patent independently, and then open a scope conversation through our partnership page. And if our honest assessment above points you to Algordanza or Semper Fides instead — that is a legitimate outcome of a real comparison.

References

All figures in this article are sourced from the official websites of the companies profiled, retrieved October 2026.

1. Eterneva — Homepage. https://www.eterneva.com/
2. Eterneva — Memorial Diamond Cost & Pricing. https://www.eterneva.com/resources/memorial-diamond-cost
3. Eterneva — What to Do With Cremation Ashes (IGI grading step). https://www.eterneva.com/resources/what-to-do-with-cremation-ashes
4. Eterneva — FAQ (colors, materials, timelines). https://www.eterneva.com/faq
5. Algordanza — Official website (Kosten, Ablauf, Für Bestatter, Partnerbereich, Academy, Über Uns). https://www.algordanza.com/
6. Algordanza — FAQ (500 g minimum, generic-carbon statement, Semper Fides partnership). https://www.algordanza.com/en/faq
7. Algordanza Hong Kong — Memorial Diamonds for Pets (Semper Fides specs: 4–9 months, HKD 18,830, GEMLAB). https://www.algordanza.com.hk/memorial-diamond-for-pets
8. Semper Fides — Official website (since 2006, 300 g / 5 g minimums, no generic carbon, Swiss manufactory, partner network). https://semperfides.ch/
9. Semper Fides — Die Entstehung / Konditionen (€2,290 from-price, 0.25–1.0 ct). https://www.semperfides.eu/die-entstehung/
10. Lonité — Homepage USA (12 months, from $1,400, 4N purity, IGI, material minimums, Buffalo office). https://www.lonite.com/
11. Lonité EU — Pet Memorial Diamond (Berlin/Zürich offices, Swiss lab tour). https://www.lonite.eu/pets-cremation-ashes-into-diamonds
12. Heart in Diamond — Homepage (full price matrix, seven colors, cut surcharges, carbon sources, certification terms). https://www.heart-in-diamond.com/