Is Diamond Foundry profitable in 2026?

Diamond Foundry states on its own website that it has been profitable for roughly five years and describes itself as growing fast and profitably (vendor claim, df.com, n.d.). No independently audited revenue or profit figure has been confirmed to verify this claim.

Who owns Diamond Foundry?

Diamond Foundry is privately held and venture backed, with investors including Leonardo DiCaprio, Fidelity Investments (which led a $200M Series C in March 2021 at a $1.8B valuation), and Spain's Moira Capital, which took a minority stake in May 2026 tied to its Spain expansion.

Could AI replace Diamond Foundry's business?

No. Diamond Foundry's physical plasma-reactor crystal growth process cannot be replicated by AI software; instead, AI datacenter growth is a demand tailwind, with rival Akash Systems already shipping diamond-cooled AMD Instinct MI350X AI servers in March 2026.

Who is Diamond Foundry's biggest competitor?

In semiconductor cooling, Akash Systems is ahead: it launched the first diamond-cooled AI servers with AMD Instinct MI350X GPUs in March 2026 and secured a reported $300M order, before Diamond Foundry's Spain wafer fabs are fully online (targeted 2027-2028).

Is Diamond Foundry's VRAI jewelry business struggling?

Yes. Lab-grown diamond wholesale prices have fallen about 90% since 2018 and 42-50% year over year in 2025, per De Beers-linked reporting from June and July 2026, squeezing margins across the entire lab-grown jewelry category including VRAI.

When will Diamond Foundry's Spain diamond wafer fabs be operational?

Diamond Foundry's D Foundry II in Trujillo began operating in January 2025, five weeks ahead of schedule, while a separate €1.3B Zaragoza cutting and polishing plant targets full operation with about 300 workers by 2028, per July 2026 reporting.

United States · United States

Diamond Foundry

Diamond Foundry grows lab diamonds for jewelry (VRAI) and semiconductor-grade wafers for chip cooling.

Losing its protection

Assessed 29 July 2026 · Evidence as of 29 July 2026

The structural protection is eroding.

On the recordSince 29 July 2026 · Checkable from 2027-2028 · Every call on the record Checkpoint: Spain (Trujillo) fab full commercial ramp target

The call

Its jewelry business is being priced into commodity territory while its semiconductor bet still needs a disclosed hyperscaler customer and an on-time Spanish fab to prove out.

Diamond Foundry grows diamond wafers in labs instead of mining them, then sells them to computer chip makers for cooling and electronics. The company has patents and a Spanish factory backed by government money, which are hard for others to copy quickly. However, a rival called Akash Systems is already shipping similar products to customers, and Diamond Foundry's jewelry business has collapsed in price by 90 percent since 2018. The one thing that matters most: whether Diamond Foundry can land a major tech company as a customer for its diamond wafers before Akash Systems does, and whether the Spanish factory can actually produce at the scale the company needs by 2027 or 2028.

Why

AI pressure: Akash Systems. Akash Systems already ships diamond substrate wafers for AI chip and RF cooling, competing for the same hyperscaler design wins DF still needs. Could AI do the core job? Unlikely.

Bigger players: De Beers / Element Six. Element Six, De Beers' industrial diamond arm, has decades of production scale and could pivot into semiconductor wafers as jewelry demand collapses. Could a giant copy it? Probably.

What protects it. Patented reactor IP plus a government-funded Spanish fab give it a physical production base rivals would need years to replicate.

What would change this call

Diamond Foundry discloses a shipped hyperscaler or tier-1 semiconductor wafer customer. Would show the semiconductor moat is converting into real revenue, not just patents.
Akash Systems announces a second major hyperscaler order before Diamond Foundry names a customer. Would show a shipped competitor is capturing the AI-cooling market first.
Spain (Trujillo) fab reaches full production on or near the 2027-2028 target. Would confirm the capital-intensive manufacturing bet is executing on schedule.

Key numbers

$1.8B valuation set in 2021 Fidelity-led round (2023-03-29)
Spain committed €753M toward $2.77B wafer fab (2025-11-25)
Lab-grown diamond wholesale prices down ~90% since 2018 (2026-07-07)

Named risks

VRAI jewelry margins squeezed by ~90% wholesale lab-grown diamond price collapse since 2018. Severity: high
Akash Systems locking hyperscaler design-ins for diamond-cooled AI hardware before DF's Spain fabs reach scale. Severity: high
Multi-billion euro Spain fab execution and 2027-2029 capital commitments unproven at commercial scale. Severity: medium
Wildly inconsistent public revenue ($18M-$271.6M) and headcount (120-1,000) figures undermine verifiability. Severity: medium
Unresolved 2022 lawsuit against US Trade Representative over China diamond-polishing tariffs. Severity: low

Rivals, as read in July 2026

Rival	Direction	Evidence
Akash Systems	losing to	Shipped diamond-cooled AMD MI350X AI servers and secured $300M order by March 2026, ahead of DF's Spain fabs
De Beers / Element Six	contesting	Closed lab-grown brand Lightbox 2024, refocused Element Six on industrial/semiconductor diamond amid own valuation drop to ~$4B by 2026
Brilliant Earth / Pandora	gaining on	Pandora fully lab-grown since 2021 with carbon labeling added May 2026, competing directly with VRAI amid price collapse

Questions people ask

Is Diamond Foundry profitable in 2026?: Diamond Foundry states on its own website that it has been profitable for roughly five years and describes itself as growing fast and profitably (vendor claim, df.com, n.d.). No independently audited revenue or profit figure has been confirmed to verify this claim.
Who owns Diamond Foundry?: Diamond Foundry is privately held and venture backed, with investors including Leonardo DiCaprio, Fidelity Investments (which led a $200M Series C in March 2021 at a $1.8B valuation), and Spain's Moira Capital, which took a minority stake in May 2026 tied to its Spain expansion.
Could AI replace Diamond Foundry's business?: No. Diamond Foundry's physical plasma-reactor crystal growth process cannot be replicated by AI software; instead, AI datacenter growth is a demand tailwind, with rival Akash Systems already shipping diamond-cooled AMD Instinct MI350X AI servers in March 2026.
Who is Diamond Foundry's biggest competitor?: In semiconductor cooling, Akash Systems is ahead: it launched the first diamond-cooled AI servers with AMD Instinct MI350X GPUs in March 2026 and secured a reported $300M order, before Diamond Foundry's Spain wafer fabs are fully online (targeted 2027-2028).
Is Diamond Foundry's VRAI jewelry business struggling?: Yes. Lab-grown diamond wholesale prices have fallen about 90% since 2018 and 42-50% year over year in 2025, per De Beers-linked reporting from June and July 2026, squeezing margins across the entire lab-grown jewelry category including VRAI.
When will Diamond Foundry's Spain diamond wafer fabs be operational?: Diamond Foundry's D Foundry II in Trujillo began operating in January 2025, five weeks ahead of schedule, while a separate €1.3B Zaragoza cutting and polishing plant targets full operation with about 300 workers by 2028, per July 2026 reporting.

Timeline

2026-07-07De Beers cuts prices amid lab-grown diamond price crisis and ~$2B unsold inventory report
2026-07-07Zaragoza wafer-cutting plant investment raised to EUR1.3B, targeting 2028 operation
2026-05-19Moira Capital (Javier Loizaga) takes minority stake tied to Spain expansion
2026-04-21Diamond Foundry publishes claim of 100x AI datacenter cooling with 55x less water
2026-03-03Akash Systems launches diamond-cooled AI servers with AMD Instinct MI350X GPUs
2025-11-25Spain's SETT commits EUR753M toward $2.77B Trujillo wafer fab expansion
2025-01D Foundry II Trujillo rough-diamond foundry commences operation, ahead of schedule
2023-11Diamond Foundry announces world's first 100mm single-crystal diamond wafer
2021-03Fidelity Investments leads $200M Series C, valuing Diamond Foundry at $1.8B
2016-11Diamond Foundry acquires jewelry brand VRAI (then Vrai and Oro)

Revision history

29 July 2026

First assessed. Losing its protection. The text above is fixed as of this date and is not edited afterwards.

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