1.9 Carat Round Lab Grown Diamond (D IF, IGI 750552972) Prices
Rings.com Research
1.9 Carat Round Lab Grown Diamond (D IF, IGI 750552972) Prices
Source: the Rings.com Lab-Grown Diamond Price Index. Methodology and monthly benchmark: Lab Grown Diamond Price Per Carat.
Data as of September 2026, captured September 17, 2026. Updated monthly. USD.
This page tracks one specific lab grown diamond, identified by its IGI certificate 750552972, across the US retailers publicly listing it. Because the certificate number matches exactly, this is a same-stone price comparison: identical diamond, different prices.
September 2026 prices for IGI 750552972
| Retailer | Listed price (September 2026) | Price per carat | Listing |
|---|---|---|---|
| Brilliant Earth | $5,960 | $3,137 | view at Brilliant Earth |
| Ritani | $1,194 | $628 | view at Ritani |
Price spread: $4,766 (399.2%)
between Brilliant Earth ($5,960) and Ritani ($1,194) for the same certified stone on September 17, 2026.
Stone details (IGI certificate 750552972)
| Carat | 1.9 |
|---|---|
| Shape | Round |
| Color | D |
| Clarity | IF |
| Cut | Excellent |
| Polish | Excellent |
| Symmetry | Excellent |
| Certificate | IGI 750552972 |
Shape, carat, color, and clarity are as reported identically by every retailer listing this certificate. Retailer-assigned grades (cut, polish, symmetry, which are not always certificate-backed on fancy shapes) are shown only where all listing retailers agree; where they disagree, the field is omitted.
Listing-price history
| Month | Brilliant Earth | Ritani |
|---|---|---|
| April 2026 | $6,300 | $2,227 |
| May 2026 | $6,300 | — |
| June 2026 | $6,300 | — |
| July 2026 | $6,280 | — |
| August 2026 | $5,960 | — |
| September 2026 | $5,960 | $1,194 |
"—" means the stone did not appear in that retailer's public listings in that month's collection cycle.
Loose stones only. Every figure on this page is for a loose lab grown diamond as listed, before any ring setting. No blended ring-total pricing appears on this page; setting costs vary by retailer and are never merged into these comparisons.
How current are these prices?
Every price on this page was captured from public retailer listings on September 17, 2026 (September 2026 collection cycle) and is accurate as of that date only. Retailers reprice and delist stones continuously, so any listing shown here may have sold, been delisted, or changed price since capture.
- Brilliant Earth: last verified in its public listings on September 17, 2026. Re-checked on the index's collection cycle (currently monthly; weekly refresh rolling out).
- Ritani: last verified in its public listings on September 17, 2026. Re-checked on the index's collection cycle (currently monthly; weekly refresh rolling out).
About this data
Prices are publicly listed retail prices for loose lab grown diamonds, collected from each retailer's public website on September 17, 2026. No accounts, logins, or paywalls are involved; these are the prices any shopper sees. Rings.com is an independent research publisher, not a jewelry retailer, and publishes this data as an attributed, dated record of public listing prices. Retailer names are used for identification only; Rings.com is not affiliated with any retailer listed.
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Rings.com Lab-Grown Diamond Price Index