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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, 68 of them, across 394,056 current listings.

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

The market at this size and shape

Active listings

394,056

Retailers carrying

68

Median confirmed price

NZ$1,344

Grade combinations

30

Certificate mix:IGI 348,963 · GIA 29,641 · GCAL 7,399 · HRD 56

What it actually costs

Half of these diamonds are listed between NZ$951 and NZ$1,920 (as of October 30, 2026).

Lower 10% NZ$858Median NZ$1,344Upper 10% NZ$3,753

Middle half listed between NZ$951 to NZ$1,920

Certificated stones with a recently confirmed price only, 48,375 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

287%

Typical difference

NZ$3,824

Stones compared

36,726

Across 36,726 stones of this size and shape carried by more than one retailer, the dearest listing sits 287% above the cheapest for the identical certificated diamond, a typical gap of NZ$3,824. 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. 3Rare Carat21,994 in stock
    United States·Founded 2016·30-day returns·Ships to New Zealand
    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 New Zealand
    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 New Zealand
    Terms not yet verified
    Visit Aurelinne
  10. 10Moon Ocean14,328 in stock
    United Kingdom·Founded 2022·30-day returns·Ships to New Zealand
    Terms not yet verified
    Visit Moon Ocean
Show 15 more retailers
  2. 12B2C Jewels13,448 in stock
    United States·Founded 2004·30-day returns·Ships to New Zealand
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  3. 13Adiamor13,185 in stock
    United States·Founded 1999·30-day returns
    Terms not yet verified
    Visit Adiamor
  4. 14Brilliance13,082 in stock
    United States·Founded 2002·30-day returns·Ships to New Zealand
    Terms not yet verified
    Visit Brilliance
  5. 15

    The Perfect Carat

    12,876 in stock
    US
    Terms not yet verified
  7. 17RockHer9,989 in stock
    United States·Founded 2016·40-day returns·Ships to New Zealand
    Terms not yet verified
    Visit RockHer
  8. 18Cape Diamonds8,288 in stock
    South Africa·Founded 2005·7-day returns·Ships to New Zealand
    Terms read on the retailer’s own site, June 15, 2026
    Visit Cape Diamonds
  14. 24GemsNY6,032 in stock
    United States·Founded 1988·30-day returns·Ships to New Zealand
    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.

15 of the 25 retailers ship to New Zealand. 10 do not.

Narrow it down by grade

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

E VVS263,737 · 59rE VS148,462 · 59rF VVS245,054 · 58rD VVS237,930 · 60rD VS134,766 · 61rF VS128,679 · 56rD VVS125,847 · 54rE VS215,797 · 52rD IF14,465 · 53rD FL12,318 · 42rG VS111,701 · 51rG VVS211,687 · 48rE VVS19,037 · 56rF VS28,944 · 47rD VS26,923 · 47rG VS24,133 · 46rH VS14,035 · 37rF VVS13,670 · 47rH VVS22,111 · 30rE IF1,600 · 47rG VVS1940 · 41rH VS2720 · 35rE FL566 · 40rF IF348 · 40rI VS1205 · 30rG IF180 · 29rH VVS199 · 17rI VVS237 · 19rI VS236 · 21rF FL24 · 24r

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 36,726 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 287%, about NZ$3,824.

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.

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