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Carat Hunter · Where to buy diamonds

Where to buy a 3ct lab-grown princess diamond

Every retailer in our index stocking this size and shape, 57 of them, across 123,157 current listings.

Updated October 29, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

123,157

Retailers carrying

57

Median confirmed price

£496

Grade combinations

29

Certificate mix:IGI 107,852 · GIA 8,835 · GCAL 2,157 · HRD 119

What it actually costs

Half of these diamonds are listed between £388 and £999 (as of October 29, 2026).

Lower 10% £342Median £496Upper 10% £2,724

Middle half listed between £388 to £999

Certificated stones with a recently confirmed price only, 9,102 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

382%

Typical difference

£2,070

Stones compared

7,831

Across 7,831 stones of this size and shape carried by more than one retailer, the dearest listing sits 382% above the cheapest for the identical certificated diamond, a typical gap of £2,070. 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. 2

    The Perfect Carat

    6,529 in stock
    US
    Terms not yet verified
  3. 3NZ Jewellers6,402 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
  5. 5Rare Carat6,221 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
  6. 6Aurelinne6,160 in stock
    United States·Founded 2021·30-day returns·Ships to Ireland
    Terms not yet verified
    Visit Aurelinne
  8. 8Adiamor4,735 in stock
    United States·Founded 1999·30-day returns
    Terms not yet verified
    Visit Adiamor
Show 15 more retailers
  3. 13B2C Jewels4,291 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. 16RockHer3,678 in stock
    United States·Founded 2016·40-day returns·Ships to Ireland
    Terms not yet verified
    Visit RockHer
  11. 21Cape Diamonds2,739 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
  12. 22Yorxs2,732 in stock
    Germany·Founded 2011·100-day returns
    Terms not yet verified
    Visit Yorxs

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.

16 of the 25 retailers ship to Ireland. 9 do not.

Narrow it down by grade

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

E VS123,117 · 54rE VVS221,396 · 53rF VVS213,363 · 54rD VS112,859 · 49rF VS19,433 · 51rD VVS27,612 · 53rG VS15,208 · 49rG VVS24,113 · 47rE VS23,910 · 46rD VVS13,224 · 46rE VVS12,944 · 47rD FL2,786 · 33rD IF2,705 · 45rG VS22,009 · 38rF VS21,883 · 48rH VS11,519 · 40rF VVS11,464 · 46rD VS21,307 · 42rH VVS2791 · 37rH VS2542 · 32rI VS1303 · 32rG VVS1175 · 34rE IF144 · 33rE FL121 · 29rI VS289 · 24rH VVS148 · 25rI VVS247 · 19rF FL22 · 21rI VVS116 · 15r

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

  • Princess: a square brilliant cut, second only to round in popularity.
  • 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 7,831 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 382%, about £2,070.

Can I see retailers for one exact grade?

Yes. Each of the 29 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.

Where to Buy 3ct Lab Grown Princess Diamonds | Carat Hunter