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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, 62 of them, across 139,958 current listings.

Updated November 5, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

139,958

Retailers carrying

62

Median confirmed price

£208

Grade combinations

30

Certificate mix:IGI 135,536 · GIA 1,455 · GCAL 815 · HRD 24

What it actually costs

Half of these diamonds are listed between £149 and £319 (as of November 5, 2026).

Lower 10% £138Median £208Upper 10% £513

Middle half listed between £149 to £319

Certificated stones with a recently confirmed price only, 17,551 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Cheapest to dearest, median

342%

Cheapest to dearest, median in price

£659

Stones compared

14,158

Across 14,158 stones of this size and shape carried by more than one retailer, the dearest listing sits 342% above the cheapest for the identical certificated diamond, a typical gap of £659. That gap is what comparing before you buy avoids.

Every retailer that stocks this spec

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

  5. 5Adiamor7,735 in stock
    United States·Founded 1999·30-day returns
    Terms not yet verified
    Visit Adiamor
  6. 6B2C Jewels7,640 in stock
    United States·Founded 2004·30-day returns·Ships to Ireland
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  8. 8Rare Carat6,716 in stock
    United States·Founded 2016·30-day returns·Ships to Ireland
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  10. 10Yorxs5,700 in stock
    Germany·Founded 2011·100-day returns
    Terms not yet verified
    Visit Yorxs
Show 15 more retailers
  3. 13Cape Diamonds4,910 in stock
    South Africa·Founded 2005·7-day returns·Ships to Ireland
    Terms read on the retailer’s own site, June 15, 2026
    Visit Cape 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.

13 of the 25 retailers ship to Ireland. 12 do not.

Narrow it down by grade

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

D VVS231,387 · 57rD VS122,108 · 55rE VS118,214 · 55rD VVS117,257 · 55rE VVS215,472 · 56rE VVS16,170 · 53rD VS25,035 · 50rE VS24,571 · 48rF VS14,011 · 52rF VVS23,529 · 54rD IF2,870 · 49rD FL2,096 · 38rF VS21,401 · 42rE IF1,168 · 43rG VS11,119 · 42rG VVS2900 · 47rF VVS1861 · 50rE FL460 · 28rG VS2404 · 32rH VS1257 · 30rH VVS2171 · 29rF IF113 · 35rG VVS1108 · 30rH VS2105 · 21rI VS141 · 20rF FL35 · 21rI VS228 · 13rH VVS126 · 14rI VVS220 · 14rG FL13 · 13r

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?

Across 14,158 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 342%, about £659.

Can I see retailers for one exact grade?

Yes. Each of the 30 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.