Updated from live inventory
Lab-grown diamond price index
Follow comparable one-, two-, and three-carat prices over time and download the underlying data or chart.
Read moreResearch and data
Lab-grown diamond research and data
Our strongest work is research that another shopper, journalist, or analyst can inspect and use. This hub brings together our live price tracking, real-order experience, and the methods behind our conclusions.
Start here
Our most useful starting points
Based on real purchases
Buying, shipping, and returns benchmark
Compare what happened in our real orders at six jewelers, including four completed return tests.
Read moreLike-for-like comparison
Lab-grown diamond prices by retailer
Compare current one-, two-, and three-carat prices at Ritani, Brilliant Earth, and With Clarity using the same quality rules.
Read moreCurrent diamonds
Live diamond finder
Search current jeweler inventory by shape, carat weight, budget, and buying priority.
Read moreConsumer research from 2020
Our early US survey records how familiar people were with lab-grown diamonds before the category became mainstream.
Historical research
2020 lab-grown diamond consumer survey
Awareness, purchase consideration and the price and sourcing benefits respondents valued. Fieldwork ran June 20–25, 2020.
Understand our evidence
Our recommendations combine firsthand purchases and inspections with repeatable price research, current policy checks, and clearly attributed external evidence.
Editorial review process
How we research, update, score, disclose, and correct our reviews and buying guides.
Our diamond experts
Meet the people responsible for the site’s diamond research, testing, and editorial decisions.
Complete price research library
Browse our price guides by carat weight and put loose-diamond prices into a complete jewelry budget.
Use and cite our research
Each research report states its method, date, scope, and limits. Reuse the public data with a link to the source report and the applicable market-check date.
CSV
Download the price-index CSV
A versioned table of dated market benchmarks, coverage, and qualifying inventory counts.
SVG
Download the price-index chart
A self-contained SVG chart with source, date range, and dataset version embedded in the file.
JSON
View the price-index JSON
The same market series in a machine-readable format for developers and data analysis.
CSV
Download the retailer-price CSV
The latest like-for-like one-, two-, and three-carat benchmarks for each participating jeweler.
SVG
Download the retailer-price chart
A reusable SVG comparison chart with source, methodology scope, date, and dataset version.
JSON
View the retailer-price JSON
The latest retailer-level comparison in a compact machine-readable format.