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Carat Hunter · Where to buy diamonds

Where to buy a 1.25ct lab-grown cushion diamond

Every retailer in our index stocking this size and shape, 61 of them, across 22,326 current listings.

Updated October 31, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

22,326

Retailers carrying

61

Median confirmed price

£280

Grade combinations

28

Certificate mix:IGI 20,453 · GIA 1,073 · GCAL 232 · HRD 18

What it actually costs

Half of these diamonds are listed between £187 and £508 (as of October 31, 2026).

Lower 10% £162Median £280Upper 10% £1,086

Middle half listed between £187 to £508

Certificated stones with a recently confirmed price only, 2,914 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

393%

Typical difference

£899

Stones compared

2,231

Across 2,231 stones of this size and shape carried by more than one retailer, the dearest listing sits 393% above the cheapest for the identical certificated diamond, a typical gap of £899. 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.

  2. 2Rare Carat1,442 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
  5. 5B2C Jewels1,142 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
  9. 9Adiamor1,054 in stock
    United States·Founded 1999·30-day returns
    Terms not yet verified
    Visit Adiamor
Show 15 more retailers
  3. 13Yorxs699 in stock
    Germany·Founded 2011·100-day returns
    Terms not yet verified
    Visit Yorxs
  15. 25Allurez278 in stock
    United States·Founded 2010·30-day returns·Ships to Ireland
    Terms not yet verified
    Visit Allurez

Stock counts are updated daily. 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.

14 of the 25 retailers ship to Ireland. 11 do not.

Narrow it down by grade

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

D VVS24,488 · 52rD VS13,227 · 50rE VVS22,930 · 53rE VS12,584 · 50rD VVS12,357 · 49rF VS1957 · 43rE VVS1938 · 47rE VS2712 · 43rF VVS2676 · 43rD VS2619 · 43rG VVS2472 · 35rD IF463 · 39rD FL386 · 37rF VS2309 · 37rG VS1281 · 33rE IF197 · 33rF IF155 · 35rG VS2120 · 33rE FL109 · 21rF VVS184 · 30rH VS168 · 24rH VVS251 · 17rG VVS142 · 16rH VS234 · 13rH VVS121 · 4rI VVS214 · 13rF FL13 · 13rI VS213 · 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?

Across 2,231 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 393%, about £899.

Can I see retailers for one exact grade?

Yes. Each of the 28 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.