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Carat Hunter · Where to buy diamonds

Where to buy a 3ct lab-grown heart diamond

Every retailer in our index stocking this size and shape, 66 of them, across 36,974 current listings.

Updated November 7, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

36,974

Retailers carrying

66

Median confirmed price

NZ$1,734

Grade combinations

38

Certificate mix:IGI 30,667 · GIA 5,450 · HRD 55 · GCAL 24

What it actually costs

Half of these diamonds are listed between NZ$1,239 and NZ$2,604 (as of November 7, 2026).

Lower 10% NZ$985Median NZ$1,734Upper 10% NZ$4,344

Middle half listed between NZ$1,239 to NZ$2,604

Certificated stones with a recently confirmed price only, 3,809 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

As of November 7, 2026, the same certified diamond typically costs 44% more at a typical retailer than at the cheapest for lab-grown stones, and 21% more for natural ones (the median across stones listed by two or more retailers). Comparing shows you the cheapest of the retailers listing the same stone.

Every retailer that stocks this spec

Ranked by active inventory count. Selection is mechanical, not editorial.

  2. 2NZ Jewellers2,030 in stock
    New Zealand·Founded 2006·GCAL, GIA, HRD, IGI·30-day returns·Ships to New Zealand
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
  4. 4Carbon Sparkle1,989 in stock
    United States·GCAL, GIA, HRD, IGI·21-day returns·Ships to New Zealand
    Terms read on the retailer’s own site, September 2, 2026
    Visit Carbon Sparkle
  5. 5

    The Perfect Carat

    1,771 in stock
    US·GCAL, GIA, HRD, IGI
    Terms not yet verified
  6. 6Aurelinne1,719 in stock
    United States·Founded 2021·GIA, HRD, IGI·Ships to New Zealand
    Terms not yet verified
    Visit Aurelinne
  8. 8Adiamor1,660 in stock
    United States·Founded 1999·GCAL, GIA, IGI
    Terms not yet verified
    Visit Adiamor
Show 56 more retailers
  1. 11B2C Jewels1,361 in stock
    United States·Founded 2004·GIA, IGI·30-day returns·Ships to New Zealand
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  2. 12RockHer1,330 in stock
    United States·Founded 2016·GIA, IGI·Ships to New Zealand
    Terms not yet verified
    Visit RockHer
  11. 21Cape Diamonds817 in stock
    South Africa·Founded 2005·GIA, IGI·7-day returns·Ships to New Zealand
    Terms read on the retailer’s own site, June 15, 2026
    Visit Cape Diamonds
  13. 23

    Steven Stone

    799 in stock
    UK·GIA, IGI
    Terms not yet verified
  17. 27

    Luvansh

    596 in stock
    US
    Terms not yet verified
  19. 29Yorxs463 in stock
    Germany·Founded 2011·GIA, IGI
    Terms not yet verified
    Visit Yorxs
  22. 32

    SJ Gems

    409 in stock
    ZA·GIA, IGI
    Terms not yet verified
  24. 34

    GemTrove

    259 in stock
    AU·GIA, IGI
    Terms not yet verified
  25. 35GemsNY202 in stock
    United States·Founded 1988·GCAL, GIA, IGI·Ships to New Zealand
    Terms not yet verified
    Visit GemsNY
  30. 40Rare Carat142 in stock
    United States·Founded 2016·GCAL, GIA, IGI·30-day returns·Ships to New Zealand
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  32. 42Allurez138 in stock
    United States·Founded 2010·GIA, IGI·Ships to New Zealand
    Terms not yet verified
    Visit Allurez
  33. 43

    Keyzar

    137 in stock
    US·GIA, IGI
    Terms not yet verified
  35. 45

    Reeds

    128 in stock
    US·GCAL, IGI
    Terms not yet verified
  38. 48

    deBebians

    58 in stock
    US·GIA, IGI
    Terms not yet verified
  39. 49

    Washington Diamond

    50 in stock
    US·GIA, IGI
    Terms not yet verified
  41. 51

    Liori Diamonds

    30 in stock
    US·GIA, IGI
    Terms not yet verified
  42. 52ZCOVA25 in stock
    Malaysia·Founded 2015·IGI·Ships to New Zealand
    Terms not yet verified
    Visit ZCOVA
  49. 59Jared13 in stock
    United States·Founded 1993·GIA, IGI
    Terms not yet verified
    Visit Jared
  50. 6025karats12 in stock
    United States·Founded 2008·IGI·60-day returns·Ships to New Zealand
    Terms read on the retailer’s own site, June 15, 2026
    Visit 25karats
  51. 61Zales11 in stock
    United States·Founded 1924·GIA, IGI
    Terms not yet verified
    Visit Zales
  52. 62

    Robbins Brothers

    9 in stock
    US·IGI
    Terms not yet verified
  55. 65

    Diamond Culture

    2 in stock
    HK·IGI
    Terms not yet verified
  56. 66

    Lauren B

    1 in stock
    US
    Terms not yet verified

Stock counts reflect current listings. 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.

29 of the 52 retailers with shipping details ship to New Zealand. 23 do not. 14 retailers have not published any shipping details.

Narrow it down by grade

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

E VS15,700 · 56rD VS15,519 · 52rE VVS25,490 · 54rD VVS25,040 · 56rF VVS22,153 · 48rF VS12,066 · 50rD VVS11,828 · 50rE VVS11,529 · 45rG VS11,138 · 46rE VS21,133 · 46rD IF1,056 · 50rD FL676 · 36rD VS2609 · 43rF VS2484 · 42rG VVS2452 · 43rF VVS1383 · 42rG VS2336 · 36rE IF287 · 34rH VVS2146 · 31rF SI1144 · 33rH VS1113 · 27rG SI1100 · 30rH SI171 · 29rE SI169 · 24rG VVS169 · 29rE FL63 · 25rH VS246 · 24rJ VVS238 · 13rD SI135 · 20rI VVS235 · 14rI VS132 · 17rF IF26 · 18rH VVS124 · 22rG SI217 · 16rD SI216 · 16rF SI216 · 15rG IF14 · 14rH SI213 · 5r

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

  • Heart: a brilliant cut with a cleft and a pointed tip, classic and recognizable.
  • 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?

As of November 7, 2026, the same certified diamond typically costs 44% more at a typical retailer than at the cheapest for lab-grown stones, and 21% more for natural ones (the median across stones listed by two or more retailers). Comparing shows you the cheapest of the retailers listing the same stone.

Can I see retailers for one exact grade?

Yes. Each of the 38 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.