Eterneva Cost and Review — Memorial Diamonds from Ashes

Eterneva Pricing by Carat Size

Eterneva, based in Austin, Texas, creates lab-grown diamonds from cremation ashes or hair using high-pressure, high-temperature (HPHT) synthesis. Pricing scales with carat weight:

• 0.25 carat: $2,999–$3,499
• 0.5 carat: $5,999–$7,499
• 1 carat: $9,999–$14,999
• 2 carats: $19,999–$29,999
• 5 carats: Up to $75,000+

Color affects cost within each size tier. Blue diamonds (created by introducing boron) and colorless stones require additional processing steps and cost more than the natural amber or yellow tones that carbon-heavy ashes produce. Cut and custom setting add to the total — a basic solitaire pendant runs less than a bespoke engagement ring setting.

The Process: From Ashes to Diamond

Eterneva requires about half a cup of cremation ashes or one cup of hair to begin. The company extracts carbon from the submitted remains, purifies it, and places it in a HPHT press that replicates the conditions under which natural diamonds form — extreme pressure (around 60,000 atmospheres) and temperatures above 2,500°F.

The growth cycle takes 8 to 11 months. During that period, Eterneva sends monthly video and photo updates showing the diamond's progress — from raw carbon extraction through crystallization and final cutting. This transparency is one of the company's primary selling points and a notable differentiator in the memorial diamond industry.

After growth, the stone is cut and graded. Eterneva offers standard diamond cuts (round brilliant, princess, emerald, cushion) and can set the finished stone in jewelry or deliver it loose.

What Customers Say

The positive reviews cluster around two themes: the emotional weight of the monthly updates (many families describe receiving the progress videos as meaningful milestones during their grief) and the quality of the finished stone. Customers consistently report that the diamonds look and feel like any high-end lab-grown gem.

Common concerns in reviews include the long turnaround time (families expecting a few months are sometimes surprised by the 8–11 month window) and the total cost once setting is added. Several reviewers note that the initial quote for the diamond itself felt manageable, but the final bill after choosing a custom ring or pendant setting exceeded their expectations.

The Carbon Provenance Question

Standard cremation burns at 1,400–1,800°F, reducing the body's carbon content from about 18.5% to roughly 1–4%. What remains is mostly calcium phosphate — bone mineral. This means the amount of original human carbon available for diamond synthesis is limited, and some memorial diamond companies supplement with external carbon to reach the volume needed for a full stone.

Eterneva addresses this with their chain-of-custody system: RFID-tracked vault storage, dedicated crucibles for each client, and photo documentation of the carbon extraction. Whether the finished diamond contains exclusively the deceased's carbon or a blend is a question families should ask directly. The most transparent providers will explain exactly what percentage of the diamond's carbon comes from the submitted remains.

Eterneva vs Other Memorial Diamond Companies

The main alternatives are LifeGem (Chicago) and Algordanza (Switzerland). All three use HPHT synthesis, but they differ in transparency, pricing, and minimum ash requirements.

Eterneva's primary advantage is the detailed progress communication — the monthly updates provide emotional reassurance that traditional competitors do not match. LifeGem tends to price slightly lower at the entry level. Algordanza, being Swiss-based, charges in Swiss francs and targets the European market, with longer shipping times for US customers.

If you are considering memorial diamonds alongside other creative options — space burials, reefs, glass art, or solidified remains — our guide provides a side-by-side comparison of costs, timelines, and logistics.