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Carat Hunter · Where to buy diamonds

Where to buy a 3ct lab-grown marquise diamond

Every retailer in our index stocking this size and shape, 62 of them, across 191,790 current listings.

Updated November 2, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

191,790

Retailers carrying

62

Median confirmed price

NZ$1,143

Grade combinations

28

Certificate mix:IGI 184,060 · GCAL 986 · GIA 574 · HRD 2

What it actually costs

Half of these diamonds are listed between NZ$967 and NZ$1,995 (as of November 2, 2026).

Lower 10% NZ$910Median NZ$1,143Upper 10% NZ$4,302

Middle half listed between NZ$967 to NZ$1,995

Certificated stones with a recently confirmed price only, 27,464 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

169%

Typical difference

NZ$2,789

Stones compared

23,294

Across 23,294 stones of this size and shape carried by more than one retailer, the dearest listing sits 169% above the cheapest for the identical certificated diamond, a typical gap of NZ$2,789. 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 Carat14,344 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
  8. 8NZ Jewellers6,777 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
  10. 10Adiamor6,318 in stock
    United States·Founded 1999·30-day returns
    Terms not yet verified
    Visit Adiamor
Show 15 more retailers
  1. 11B2C Jewels6,198 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. 13

    The Perfect Carat

    5,882 in stock
    US
    Terms not yet verified
  5. 15Aurelinne5,135 in stock
    United States·Founded 2021·30-day returns·Ships to New Zealand
    Terms not yet verified
    Visit Aurelinne
  7. 17Moon Ocean4,551 in stock
    United Kingdom·Founded 2022·30-day returns·Ships to New Zealand
    Terms not yet verified
    Visit Moon Ocean
  8. 18RockHer4,457 in stock
    United States·Founded 2016·40-day returns·Ships to New Zealand
    Terms not yet verified
    Visit RockHer
  14. 24GemsNY3,091 in stock
    United States·Founded 1988·30-day returns·Ships to New Zealand
    Terms not yet verified
    Visit GemsNY
  15. 25Yorxs2,795 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.

14 of the 25 retailers ship to New Zealand. 11 do not.

Narrow it down by grade

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

E VVS242,210 · 56rE VS128,772 · 57rF VVS224,938 · 55rF VS118,860 · 52rD VVS213,855 · 55rD VVS19,383 · 53rE VVS18,659 · 55rD VS18,195 · 50rE VS27,332 · 43rG VVS27,139 · 44rF VS25,397 · 44rG VS15,296 · 43rF VVS12,743 · 52rD IF1,857 · 44rD FL1,772 · 33rD VS21,261 · 43rG VS2837 · 30rE IF797 · 39rH VVS2687 · 34rH VS1637 · 31rG VVS1557 · 39rF IF164 · 30rE FL141 · 29rH VS297 · 14rI VS170 · 20rH VVS164 · 6rG IF33 · 26rI VVS227 · 22r

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

  • Marquise: a pointed-end ellipse that faces up large for its carat.
  • 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 23,294 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 169%, about NZ$2,789.

Can I see retailers for one exact grade?

Yes. Each of the 28 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 Marquise Diamonds | Carat Hunter