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Carat Hunter · Where to buy diamonds

Where to buy a 1ct lab-grown cushion diamond

Every retailer in our index stocking this size and shape, 64 of them, across 142,901 current listings.

Updated November 6, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

142,901

Retailers carrying

64

Median confirmed price

£209

Grade combinations

40

Certificate mix:IGI 138,469 · GIA 1,479 · GCAL 842 · HRD 25

What it actually costs

Half of these diamonds are listed between £149 and £321 (as of November 6, 2026).

Lower 10% £139Median £209Upper 10% £512

Middle half listed between £149 to £321

Certificated stones with a recently confirmed price only, 17,625 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

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.

Every retailer that stocks this spec

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

  2. 277 Diamonds10,253 in stock
    United Kingdom·Founded 2005·GCAL, GIA, HRD, IGI·Ships to United Kingdom
    Terms not yet verified
    Visit 77 Diamonds
  5. 5Adiamor7,767 in stock
    United States·Founded 1999·GCAL, GIA, IGI
    Terms not yet verified
    Visit Adiamor
  6. 6B2C Jewels7,598 in stock
    United States·Founded 2004·GIA, IGI·30-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  8. 8Rare Carat6,813 in stock
    United States·Founded 2016·GCAL, GIA, IGI·30-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  10. 10Yorxs5,773 in stock
    Germany·Founded 2011·GIA, IGI
    Terms not yet verified
    Visit Yorxs
Show 54 more retailers
  3. 13Cape Diamonds5,087 in stock
    South Africa·Founded 2005·GIA, IGI·7-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, June 15, 2026
    Visit Cape Diamonds
  16. 26GemsNY1,528 in stock
    United States·Founded 1988·GCAL, GIA, IGI·Ships to United Kingdom
    Terms not yet verified
    Visit GemsNY
  22. 32RockHer541 in stock
    United States·Founded 2016·GIA, IGI·Ships to United Kingdom
    Terms not yet verified
    Visit RockHer
  24. 34Blue Nile407 in stock
    United States·Founded 1999·GCAL, GIA, IGI·Ships to United Kingdom
    Terms not yet verified
    Visit Blue Nile
  27. 37Allurez331 in stock
    United States·Founded 2010·IGI·Ships to United Kingdom
    Terms not yet verified
    Visit Allurez
  32. 42Jared189 in stock
    United States·Founded 1993·GCAL, GIA, IGI
    Terms not yet verified
    Visit Jared
  33. 43

    The Perfect Carat

    180 in stock
    US·GIA, HRD, IGI
    Terms not yet verified
  34. 44Zales170 in stock
    United States·Founded 1924·GCAL, GIA, IGI
    Terms not yet verified
    Visit Zales
  35. 45NZ Jewellers144 in stock
    New Zealand·Founded 2006·GIA, HRD, IGI·30-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
  36. 46Carbon Sparkle134 in stock
    United States·GIA, HRD, IGI·21-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, September 2, 2026
    Visit Carbon Sparkle
  37. 47Aurelinne127 in stock
    United States·Founded 2021·GIA, HRD, IGI·Ships to United Kingdom
    Terms not yet verified
    Visit Aurelinne
  38. 48ZCOVA116 in stock
    Malaysia·Founded 2015·IGI·Ships to United Kingdom
    Terms not yet verified
    Visit ZCOVA
  43. 53

    GemTrove

    62 in stock
    AU·GIA, IGI
    Terms not yet verified
  45. 5525karats26 in stock
    United States·Founded 2008·IGI·60-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, June 15, 2026
    Visit 25karats
  46. 56

    Distinctive Gem

    21 in stock
    US·IGI
    Terms not yet verified
  49. 59

    Whiteflash

    3 in stock
    US·GIA, IGI
    Terms not yet verified
  51. 61

    Lauren B

    2 in stock
    US
    Terms not yet verified
  53. 63VRAI2 in stock
    United States·Founded 2014·Ships to United Kingdom
    Terms not yet verified
    Visit VRAI
  54. 64

    Diamovida

    1 in stock
    CA·IGI
    Terms not yet verified

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.

36 of the 58 retailers with shipping details ship to United Kingdom. 22 do not. 6 retailers have not published any shipping details.

Narrow it down by grade

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

D VVS231,612 · 57rD VS122,319 · 55rE VS118,359 · 55rD VVS117,590 · 55rE VVS215,658 · 56rE VVS16,260 · 53rD VS25,036 · 50rE VS24,567 · 48rF VS14,044 · 52rF VVS23,591 · 54rD IF2,937 · 49rD FL2,150 · 38rF VS21,400 · 42rE IF1,192 · 43rG VS11,124 · 42rG VVS2901 · 46rF VVS1875 · 50rE SI1593 · 37rE FL465 · 28rD SI1423 · 34rG VS2402 · 31rH VS1254 · 29rF SI1202 · 26rH VVS2168 · 28rF IF115 · 35rG VVS1106 · 30rH VS2104 · 20rE SI263 · 22rG SI154 · 20rI VS141 · 20rD SI240 · 16rF FL35 · 21rJ VS129 · 14rI VS228 · 13rH VVS126 · 14rH SI124 · 15rI VVS220 · 14rK VVS218 · 12rG FL13 · 13rI SI110 · 10r

Stones at this spec now

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

What this spec means

  • 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.

Frequently asked

How much do retailers differ on the same diamond?

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.

Can I see retailers for one exact grade?

Yes. Each of the 40 colour and clarity combinations above has its own page listing the retailers that stock exactly that grade.

Does Carat Hunter earn commission from these retailers?

No. We earn zero affiliate revenue from any retailer in our index.

How fresh is this data?

Listings refresh as we re-read each retailer, most of them every day. Static facts about each retailer refresh weekly.

How is the retailer ranking calculated?

Strictly by active inventory count for this exact spec. The retailer carrying the most stones at the spec ranks first. There is no editorial input, weighting or affiliate consideration.

Why do you not show per-retailer prices on this page?

Prices vary per stone, not per store. Click through to any matched diamond and you will see every retailer's price on the exact same physical stone, which is the meaningful comparison.