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Carat Hunter · Where to buy diamonds

Where to buy a 3ct lab-grown radiant diamond

Every retailer in our index stocking this size and shape, 65 of them, across 170,980 current listings.

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

The market at this size and shape

Active listings

170,980

Retailers carrying

65

Median confirmed price

£1,041

Grade combinations

30

Certificate mix:IGI 145,686 · GIA 18,147 · GCAL 3,392 · HRD 4 · AGS 3

What it actually costs

Half of these diamonds are listed between £624 and £1,266 (as of November 5, 2026).

Lower 10% £434Median £1,041Upper 10% £1,820

Middle half listed between £624 to £1,266

Certificated stones with a recently confirmed price only, 22,956 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Cheapest to dearest, median

314%

Cheapest to dearest, median in price

£1,879

Stones compared

12,490

Across 12,490 stones of this size and shape carried by more than one retailer, the dearest listing sits 314% above the cheapest for the identical certificated diamond, a typical gap of £1,879. 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.

  1. 1Rare Carat11,246 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
  3. 3NZ Jewellers9,145 in stock
    New Zealand·Founded 2006·30-day returns·Ships to Ireland
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
  6. 6Aurelinne7,743 in stock
    United States·Founded 2021·30-day returns·Ships to Ireland
    Terms not yet verified
    Visit Aurelinne
  7. 7

    The Perfect Carat

    7,490 in stock
    US
    Terms not yet verified
  9. 9Adiamor5,899 in stock
    United States·Founded 1999·30-day returns
    Terms not yet verified
    Visit Adiamor
Show 15 more retailers
  2. 12B2C Jewels5,449 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
  6. 16RockHer4,587 in stock
    United States·Founded 2016·40-day returns·Ships to Ireland
    Terms not yet verified
    Visit RockHer
  10. 20Yorxs3,766 in stock
    Germany·Founded 2011·100-day returns
    Terms not yet verified
    Visit Yorxs
  13. 23Cape Diamonds3,520 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 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 VVS226,138 · 54rE VS119,278 · 57rE VVS219,269 · 60rD VS117,686 · 59rD VVS117,107 · 52rD IF14,050 · 51rF VVS210,734 · 54rF VS19,808 · 51rD FL6,364 · 39rE VVS14,929 · 53rG VS14,612 · 46rG VVS24,354 · 45rE VS23,849 · 49rD VS22,948 · 48rF VS22,040 · 46rG VS21,571 · 41rH VS11,378 · 36rE IF1,283 · 44rF VVS11,057 · 49rH VS2789 · 36rH VVS2385 · 35rF IF367 · 40rG IF260 · 32rE FL241 · 32rG VVS1175 · 39rI VS1119 · 23rH VVS171 · 23rI VVS243 · 22rH IF38 · 25rI VS235 · 19r

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

  • Radiant: a rectangular brilliant cut that combines the emerald outline with round-style faceting.
  • 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 12,490 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 314%, about £1,879.

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.