The price list for lab-grown diamonds. With the proof behind the brand.

Colour by clarity, in US$ per carat, computed by the GDCS formula. Pick a cell, then see what the brand's tier adds.

gdcs.ai / price listrules v8 · frozen

Benchmark, round basis · 1.00–1.49 ct · US$ per carat

GDCS benchmark: every cell computed by the GDCS formula

Brand

01 · Benchmark—

02 · This stone at benchmark—

03 · Proof—

04 · GDCS value—

Lab-grown · loose · grades per GDCS/T—2027 · benchmark 2026-10-02 · index 2026-09 · sha 89691eea

A price has three parts.

The stoneShape, carat, colour, clarity, cut.

ProofThe brand's AIDI tier, once a fact is checked.

The nameThe box, the service, the logo.

The stone. Priced by the GDCS benchmark.

Proof. Checked by others.

The name. Fine to charge for. Just not proof.

GDCS values the first two. 500 brands, updated monthly. How it is calculated.

No brand can pay to change a result.