Where to buy a 1.25ct lab-grown round diamond

Half of these diamonds are listed between $199 and $500 (as of November 6, 2026).

Certificated stones with a recently confirmed price only, 20,447 of them. Each contributes its cheapest confirmed price.

As of November 6, 2026, the same certified diamond typically costs 44% more at a typical retailer than at the cheapest for lab-grown stones, and 20% more for natural ones (the median across stones listed by two or more retailers). Comparing shows you the cheapest of the retailers listing the same stone.

Ranked by active inventory count. Selection is mechanical, not editorial.

1. 1Carbon Sparkle18,482 in stock

   United States·GCAL, GIA, HRD, IGI·21-day returns·Ships to United States

   Terms read on the retailer’s own site, September 2, 2026

   Visit Carbon Sparkle
2. 2Aurelinne17,775 in stock

   United States·Founded 2021·GCAL, GIA, IGI·Ships to United States

   Terms not yet verified

   Visit Aurelinne
3. 3NZ Jewellers17,028 in stock

   New Zealand·Founded 2006·GCAL, GIA, IGI·30-day returns·Ships to United States

   Terms read on the retailer’s own site, October 19, 2026

   Visit NZ Jewellers
4. 4

   The Perfect Carat

   15,074 in stock

   US·GCAL, GIA, IGI·Ships to United States

   Terms not yet verified
5. 5Loose Grown Diamond14,902 in stock

   United States·Founded 2018·GCAL, GIA, IGI·Ships to United States

   Terms not yet verified

   Visit Loose Grown Diamond
6. 6MOH London13,890 in stock

   United Kingdom·GCAL, GIA, IGI

   Terms not yet verified

   Visit MOH London
7. 7Rare Carat12,289 in stock

   United States·Founded 2016·GCAL, GIA, IGI·30-day returns·Ships to United States

   Terms read on the retailer’s own site, October 19, 2026

   Visit Rare Carat
8. 877 Diamonds11,854 in stock

   United Kingdom·Founded 2005·GCAL, GIA, IGI·Ships to United States

   Terms not yet verified

   Visit 77 Diamonds
9. 9B2C Jewels11,761 in stock

   United States·Founded 2004·AGS, GCAL, GIA, IGI·30-day returns·Ships to United States

   Terms read on the retailer’s own site, October 19, 2026

   Visit B2C Jewels
10. 10Taylor and Hart11,445 in stock

    United Kingdom·Founded 2013·GCAL, GIA, IGI·Ships to United States

    Terms not yet verified

    Visit Taylor and Hart

Stock counts reflect current listings. Founded and shipping details come from public sources. Return terms are our summary of each retailer's own policy page, dated per retailer above. Retailers change their terms, so check the retailer's own returns and shipping pages before you buy.

56 of the 64 retailers with shipping details ship to United States. 8 do not. 4 retailers have not published any shipping details.

Each combination below has its own page with the retailers that stock exactly that grade.

Current examples carried by more than one retailer, so the comparison is real. Prices shown in USD.

• 1.28ct D VVS2from $185 across 5 retailersAs of November 5, 2026
• 1.2ct D VVS2from $164 across 21 retailersAs of November 5, 2026
• 1.21ct D VS1from $179 across 6 retailersAs of November 5, 2026
• 1.27ct D VS1from $180 across 5 retailersAs of November 5, 2026
• 1.26ct D VVS1from $184 across 6 retailersAs of November 5, 2026
• 1.25ct D VVS1from $183 across 15 retailersAs of November 5, 2026

• Round: the most common cut, with the highest light return per carat.
• Lab-grown: chemically identical to natural diamonds, typically at least 90% less than a comparable natural cohort from 1 carat up.