Retailer prices are difficult to compare when one store highlights a sale, another shows a crossed-out list price, and their search results use different quality grades. We compare live inventory instead. Each jeweler gets one benchmark at each carat weight, so Ritani's much larger and often cheaper catalog cannot pull the combined market figure down simply by containing more diamonds.
Latest recorded price comparison
These are loose-diamond prices before a ring setting or other jewelry is added. Each figure represents the typical price among up to five of that jeweler's least-expensive qualifying diamonds, rather than one unusually cheap listing.
| Jeweler | 1 carat | 2 carats | 3 carats | Matching listings across shown sizes |
|---|---|---|---|---|
| Brilliant Earth | $500 | $1,200 | $2,140 | 873 |
| Ritani | $252 | $455 | $660 | 3,875 |
| With Clarity | $379 | $868 | $1,317 | 3,381 |
What the latest comparison shows
- 1-carat diamonds: Ritani has the lowest recorded benchmark at $252. The highest recorded benchmark in this comparison is $500 at Brilliant Earth.
- 2-carat diamonds: Ritani has the lowest recorded benchmark at $455. The highest recorded benchmark in this comparison is $1,200 at Brilliant Earth.
- 3-carat diamonds: Ritani has the lowest recorded benchmark at $660. The highest recorded benchmark in this comparison is $2,140 at Brilliant Earth.
A lower benchmark does not automatically make a jeweler the better choice. Ring designs, inspection tools, customer support, returns, warranties, and how an individual diamond looks can justify paying more. Use this table to understand the starting price, then compare the complete purchase.
Diamonds included in the comparison
- Round lab-grown diamonds close to one, two, or three carats
- D–H color and VS2–VVS1 clarity
- Strong cut grades
- In-stock inventory checked within the freshness limit at collection
Grades come from the jeweler’s listing. If the grading laboratory or report is not shown, ask the seller for the report before buying. Counts include inventory listings across the sizes shown, not unique diamonds or individual inspections.
Why the numbers can differ
Two diamonds with the same headline grades may have different proportions, measurements, fluorescence, growth characteristics, or visible details. Retailers also differ in pricing strategy and service. The table is therefore a consistent shopping benchmark, not a claim that every diamond at one store costs less.
Why we do not average every listing together
Ritani has an unusually large inventory and frequently sets the lowest benchmark in our checks. Averaging every listing from every jeweler would allow that one catalog to dominate the result. Instead, we first calculate one price for each jeweler and then compare the jewelers equally. This keeps the retailer table useful without confusing inventory size with the wider market.
How to use this comparison
Start with the price difference at your preferred carat weight. Then inspect the grading report, measurements, video, return policy, and complete ring price. Our diamond finder can surface current matches, while the market report shows how the combined multi-jeweler benchmark is moving over time.
This page compares available prices on the latest recorded check date. A missing size shows no price. The market report follows the seller-balanced price over time.
Research edited by Klaus Thorup. Read how we assess diamonds and jewelers.
Compare the carat weight you want
Use the detailed guides for shape comparisons, current examples, ring advice, and historical context at each size.
- One-carat lab-grown diamond prices
- Two-carat lab-grown diamond prices
- Three-carat lab-grown diamond prices
How to cite this report
Cite LabGrownCarats Lab-Grown Diamond Prices by Retailer, include the prices-checked date shown above, and link to this page. Inventory changes frequently, so the date is part of the finding.