Where to buy a 1.5ct lab-grown cushion diamond

Half of these diamonds are listed between $298 and $595 (as of November 7, 2026).

Certificated stones with a recently confirmed price only, 11,856 of them. Each contributes its cheapest confirmed price.

As of November 7, 2026, the same certified diamond typically costs 44% more at a typical retailer than at the cheapest for lab-grown stones, and 21% 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. 1Loose Grown Diamond7,666 in stock

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

   Terms not yet verified

   Visit Loose Grown Diamond
2. 2Diamond Quarter7,617 in stock

   United Kingdom·GCAL, GIA, HRD, IGI

   Terms not yet verified

   Visit Diamond Quarter
3. 3MOH London7,366 in stock

   United Kingdom·GCAL, GIA, HRD, IGI

   Terms not yet verified

   Visit MOH London
4. 4Rare Carat6,386 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
5. 577 Diamonds6,002 in stock

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

   Terms not yet verified

   Visit 77 Diamonds
6. 6B2C Jewels5,950 in stock

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

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

   Visit B2C Jewels
7. 7Adiamor5,669 in stock

   United States·Founded 1999·GCAL, GIA, IGI·Ships to United States

   Terms not yet verified

   Visit Adiamor
8. 8Taylor and Hart5,349 in stock

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

   Terms not yet verified

   Visit Taylor and Hart
9. 9Brilliance5,226 in stock

   United States·Founded 2002·GIA, IGI·Ships to United States

   Terms not yet verified

   Visit Brilliance
10. 10Aida Diamonds4,509 in stock

    Australia·GIA, IGI

    Terms not yet verified

    Visit Aida Diamonds

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.

65 of the 76 retailers with shipping details ship to United States. 11 do not. 5 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.

• 1.49ct D VVS2from $365 across 4 retailersAs of November 6, 2026
• 1.55ct D VVS2from $237 across 16 retailersAs of November 6, 2026
• 1.48ct E VVS2from $284 across 8 retailersAs of November 7, 2026
• 1.49ct E VVS2from $286 across 7 retailersAs of November 7, 2026
• 1.54ct E VS1from $297 across 9 retailersAs of November 7, 2026
• 1.53ct E VS1from $295 across 9 retailersAs of November 7, 2026

• Cushion: a softened-corner square or rectangle with a vintage feel.
• Lab-grown: chemically identical to natural diamonds, typically at least 90% less than a comparable natural cohort from 1 carat up.