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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, 66 of them, across 434,185 current listings.

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

The market at this size and shape

Active listings

434,185

Retailers carrying

66

Median confirmed price

NZ$1,277

Grade combinations

30

Certificate mix:IGI 386,932 · GIA 29,344 · GCAL 7,439 · HRD 56

What it actually costs

Half of these diamonds are listed between NZ$945 and NZ$1,852 (as of November 5, 2026).

Lower 10% NZ$850Median NZ$1,277Upper 10% NZ$3,579

Middle half listed between NZ$945 to NZ$1,852

Certificated stones with a recently confirmed price only, 52,966 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Cheapest to dearest, median

276%

Cheapest to dearest, median in price

NZ$3,695

Stones compared

40,400

Across 40,400 stones of this size and shape carried by more than one retailer, the dearest listing sits 276% above the cheapest for the identical certificated diamond, a typical gap of NZ$3,695. 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 Carat22,250 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 Jewellers19,654 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
  9. 9Aurelinne16,516 in stock
    United States·Founded 2021·30-day returns·Ships to New Zealand
    Terms not yet verified
    Visit Aurelinne
  10. 10

    The Perfect Carat

    15,959 in stock
    US
    Terms not yet verified
Show 15 more retailers
  1. 11Adiamor15,669 in stock
    United States·Founded 1999·30-day returns
    Terms not yet verified
    Visit Adiamor
  4. 14B2C Jewels13,062 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
  5. 15RockHer10,900 in stock
    United States·Founded 2016·40-day returns·Ships to New Zealand
    Terms not yet verified
    Visit RockHer
  7. 17Moon Ocean10,312 in stock
    United Kingdom·Founded 2022·30-day returns·Ships to New Zealand
    Terms not yet verified
    Visit Moon Ocean
  9. 19Cape Diamonds7,925 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. 24GemsNY6,777 in stock
    United States·Founded 1988·30-day returns·Ships to New Zealand
    Terms not yet verified
    Visit GemsNY

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.

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 VVS273,419 · 60rE VS156,351 · 58rF VVS251,723 · 59rD VVS242,277 · 62rD VS137,795 · 61rF VS133,291 · 58rD VVS125,899 · 55rE VS216,356 · 54rD IF15,345 · 52rD FL12,721 · 43rG VS111,790 · 51rG VVS211,448 · 50rE VVS19,607 · 56rF VS29,493 · 48rD VS27,065 · 48rG VS24,391 · 46rF VVS14,339 · 48rH VS13,918 · 37rH VVS22,022 · 32rE IF1,565 · 49rG VVS11,058 · 39rH VS2743 · 35rE FL596 · 41rF IF381 · 41rI VS1210 · 30rG IF168 · 31rH VVS1100 · 14rI VVS248 · 24rI VS237 · 22rF 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 40,400 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 276%, about NZ$3,695.

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.