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Carat Hunter · Where to buy diamonds

Where to buy a 3ct lab-grown oval diamond

Every retailer in our index stocking this size and shape, 67 of them, across 400,033 current listings.

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

The market at this size and shape

Active listings

400,033

Retailers carrying

67

Median confirmed price

£558

Grade combinations

30

Certificate mix:IGI 354,942 · GIA 29,350 · GCAL 7,461 · HRD 56

What it actually costs

Half of these diamonds are listed between £399 and £793 (as of October 31, 2026).

Lower 10% £363Median £558Upper 10% £1,575

Middle half listed between £399 to £793

Certificated stones with a recently confirmed price only, 48,839 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

285%

Typical difference

£1,588

Stones compared

36,906

Across 36,906 stones of this size and shape carried by more than one retailer, the dearest listing sits 285% above the cheapest for the identical certificated diamond, a typical gap of £1,588. 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.

  4. 4Rare Carat21,994 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
  6. 6NZ Jewellers17,527 in stock
    New Zealand·Founded 2006·30-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
  7. 7Aurelinne15,473 in stock
    United States·Founded 2021·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Aurelinne
  10. 10B2C Jewels14,228 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
Show 15 more retailers
  1. 11Adiamor13,836 in stock
    United States·Founded 1999·30-day returns
    Terms not yet verified
    Visit Adiamor
  3. 13Brilliance13,496 in stock
    United States·Founded 2002·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Brilliance
  5. 15

    The Perfect Carat

    12,876 in stock
    US
    Terms not yet verified
  6. 16Moon Ocean12,002 in stock
    United Kingdom·Founded 2022·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Moon Ocean
  7. 17RockHer9,964 in stock
    United States·Founded 2016·40-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit RockHer
  8. 18Cape Diamonds8,288 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
  14. 24GemsNY6,077 in stock
    United States·Founded 1988·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit GemsNY

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.

17 of the 25 retailers ship to United Kingdom. 8 do not.

Narrow it down by grade

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

E VVS265,714 · 59rE VS150,115 · 59rF VVS246,467 · 58rD VVS238,949 · 60rD VS134,994 · 60rF VS129,560 · 56rD VVS125,592 · 54rE VS215,552 · 52rD IF14,300 · 53rD FL12,290 · 43rG VVS211,550 · 48rG VS111,505 · 51rE VVS19,026 · 57rF VS28,961 · 47rD VS26,905 · 47rG VS24,046 · 46rH VS13,911 · 37rF VVS13,724 · 47rH VVS22,117 · 30rE IF1,578 · 47rG VVS1952 · 41rH VS2723 · 35rE FL567 · 40rF IF347 · 40rI VS1204 · 30rG IF183 · 31rH VVS198 · 15rI VVS239 · 20rI VS236 · 21rF FL23 · 23r

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

  • Oval: an elongated brilliant cut that looks larger face-up than its carat weight.
  • 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 36,906 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 285%, about £1,588.

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.