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Carat Hunter · Where to buy diamonds

Where to buy a 3ct natural cushion diamond

Every retailer in our index stocking this size and shape, 66 of them, across 9,375 current listings.

Updated October 30, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

9,375

Retailers carrying

66

Median confirmed price

£21,360

Grade combinations

31

Certificate mix:GIA 8,277 · HRD 179 · IGI 126 · AGS 3

What it actually costs

Half of these diamonds are listed between £13,818 and £28,984 (as of October 30, 2026).

Lower 10% £8,741Median £21,360Upper 10% £37,058

Middle half listed between £13,818 to £28,984

Certificated stones with a recently confirmed price only, 3,163 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

49%

Typical difference

£8,744

Stones compared

2,167

Across 2,167 stones of this size and shape carried by more than one retailer, the dearest listing sits 49% above the cheapest for the identical certificated diamond, a typical gap of £8,744. 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.

  3. 3Yorxs471 in stock
    Germany·Founded 2011·100-day returns
    Terms not yet verified
    Visit Yorxs
  4. 4Rare Carat455 in stock
    United States·Founded 2016·30-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  5. 5B2C Jewels355 in stock
    United States·Founded 2004·30-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  6. 6Blue Nile347 in stock
    United States·Founded 1999·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Blue Nile
  8. 8Moon Ocean309 in stock
    United Kingdom·Founded 2022·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Moon Ocean
  10. 10Brilliance283 in stock
    United States·Founded 2002·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Brilliance
Show 15 more retailers
  3. 13RockHer245 in stock
    United States·Founded 2016·40-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit RockHer
  6. 16DreamStone216 in stock
    United States·Founded 1998·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit DreamStone
  7. 17Allurez214 in stock
    United States·Founded 2010·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Allurez
  8. 18Cape Diamonds213 in stock
    South Africa·Founded 2005·7-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, June 15, 2026
    Visit Cape Diamonds
  10. 20Jared207 in stock
    United States·Founded 1993·30-day returns
    Terms not yet verified
    Visit Jared
  12. 22Zales205 in stock
    United States·Founded 1924·30-day returns
    Terms not yet verified
    Visit Zales

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 United Kingdom. 11 do not.

Narrow it down by grade

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

H VS2856 · 53rI VS2808 · 50rI VS1748 · 49rG VS2630 · 52rG VS1616 · 57rD VS1560 · 55rH VS1530 · 53rF VS2490 · 49rD VS2483 · 48rE VS2470 · 51rE VS1404 · 49rF VS1402 · 50rG VVS2368 · 54rI VVS2266 · 45rH VVS1213 · 50rG VVS1182 · 42rF VVS2170 · 45rH VVS2160 · 38rD VVS2143 · 42rE VVS2139 · 43rF VVS1136 · 44rI VVS1132 · 37rD VVS1116 · 38rD IF115 · 36rE VVS165 · 27rI IF38 · 19rH IF35 · 23rE IF34 · 31rF IF23 · 19rD FL21 · 15rG IF20 · 17r

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.
  • Natural: mined diamonds with the certification, provenance and resale profile traditional buyers expect.

Frequently asked

How much do retailers differ on the same diamond?

Across 2,167 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 49%, about £8,744.

Can I see retailers for one exact grade?

Yes. Each of the 31 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.