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Carat Hunter · Where to buy diamonds

Where to buy a 0.75ct lab-grown cushion diamond

Every retailer in our index stocking this size and shape, 46 of them, across 19,693 live listings.

Updated September 18, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

19,693

Retailers carrying

46

Median active price

£279

Grade combinations

24

Certificate mix:IGI 18,813 · GCAL 81 · GIA 72 · HRD 1

What it actually costs

Lower 10% £121Median £279Upper 10% £597

Middle half sell between £181 to £393

Certificated stones with a live price only, 3,869 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

174%

Typical difference

£388

Stones compared

2,211

Across 2,211 stones of this size and shape carried by more than one retailer, the dearest listing sits 174% above the cheapest for the identical certificated diamond, a typical gap of £388. 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.

Show 15 more retailers

Stock counts are updated daily. Founded, return window and shipping details are retailer-provided and were last verified September 2, 2026.

Narrow it down by grade

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

D VVS26,482 · 42rD VS12,906 · 39rE VVS22,165 · 38rE VS11,925 · 37rD VVS11,788 · 36rF VS1764 · 34rD VS2496 · 36rE VVS1491 · 35rE VS2473 · 34rD IF387 · 26rF VVS2359 · 37rG VS1335 · 31rF VS2281 · 28rG VVS2215 · 32rG VS2132 · 21rE IF103 · 29rF VVS175 · 28rI VS166 · 20rD FL49 · 14rH VS146 · 18rF IF45 · 23rG VVS132 · 17rH VS224 · 14rH VVS224 · 14r

Stones at this spec now

Live 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 60% to 80% less than a comparable natural cohort.

Frequently asked

How much do retailers differ on the same diamond?

Across 2,211 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 174%, about £388.

Can I see retailers for one exact grade?

Yes. Each of the 24 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?

Live listings refresh daily. 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.