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Carat Hunter · Where to buy diamonds

Where to buy a 1.5ct lab-grown cushion diamond

Every retailer in our index stocking this size and shape, 71 of them, across 113,350 current listings.

Updated November 6, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

113,350

Retailers carrying

71

Median confirmed price

NZ$745

Grade combinations

45

Certificate mix:IGI 108,176 · GIA 2,653 · GCAL 986 · HRD 7

What it actually costs

Half of these diamonds are listed between NZ$531 and NZ$1,062 (as of November 6, 2026).

Lower 10% NZ$455Median NZ$745Upper 10% NZ$2,102

Middle half listed between NZ$531 to NZ$1,062

Certificated stones with a recently confirmed price only, 11,778 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

As of November 6, 2026, the same certified diamond typically costs 44% more at a typical retailer than at the cheapest for lab-grown stones, and 20% 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.

  4. 4Rare Carat6,386 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
  5. 5B2C Jewels6,040 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
  7. 7Adiamor5,650 in stock
    United States·Founded 1999·GCAL, GIA, IGI
    Terms not yet verified
    Visit Adiamor
Show 61 more retailers
  1. 11Yorxs4,247 in stock
    Germany·Founded 2011·GIA, HRD, IGI
    Terms not yet verified
    Visit Yorxs
  4. 14Cape Diamonds3,523 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
  9. 19RockHer2,464 in stock
    United States·Founded 2016·GIA, IGI·Ships to New Zealand
    Terms not yet verified
    Visit RockHer
  21. 31GemsNY698 in stock
    United States·Founded 1988·GCAL, GIA, IGI·Ships to New Zealand
    Terms not yet verified
    Visit GemsNY
  23. 33Blue Nile492 in stock
    United States·Founded 1999·GCAL, GIA, IGI·Ships to New Zealand
    Terms not yet verified
    Visit Blue Nile
  25. 35Allurez436 in stock
    United States·Founded 2010·GIA, IGI·Ships to New Zealand
    Terms not yet verified
    Visit Allurez
  30. 40

    The Perfect Carat

    230 in stock
    US·GIA, IGI
    Terms not yet verified
  32. 42Jared224 in stock
    United States·Founded 1993·GCAL, GIA, IGI
    Terms not yet verified
    Visit Jared
  33. 43Zales210 in stock
    United States·Founded 1924·GCAL, GIA, IGI
    Terms not yet verified
    Visit Zales
  35. 45NZ Jewellers199 in stock
    New Zealand·Founded 2006·IGI·30-day returns·Ships to New Zealand
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
  38. 48ZCOVA80 in stock
    Malaysia·Founded 2015·IGI·Ships to New Zealand
    Terms not yet verified
    Visit ZCOVA
  41. 51

    GemTrove

    57 in stock
    AU·GIA, IGI
    Terms not yet verified
  46. 5625karats17 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
  47. 57VRAI13 in stock
    United States·Founded 2014·IGI
    Terms not yet verified
    Visit VRAI
  48. 58

    Distinctive Gem

    11 in stock
    US·IGI
    Terms not yet verified
  51. 61

    Lauren B

    4 in stock
    US·IGI
    Terms not yet verified
  54. 64

    Whiteflash

    2 in stock
    US·GIA, IGI
    Terms not yet verified
  57. 67

    Diamovida

    1 in stock
    CA·IGI
    Terms not yet verified
  58. 68

    Good Old Gold

    1 in stock
    US·IGI
    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.

35 of the 63 retailers with shipping details ship to New Zealand. 28 do not. 8 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.

D VVS220,940 · 59rE VVS216,073 · 60rE VS114,105 · 60rD VS112,785 · 54rD VVS111,941 · 55rE VVS15,167 · 56rF VS15,053 · 56rF VVS24,853 · 52rD VS23,017 · 50rE VS22,871 · 52rG VS12,471 · 50rD IF2,284 · 45rD FL2,105 · 40rG VVS21,613 · 47rF VS21,441 · 49rF VVS11,137 · 46rG VS2802 · 39rD SI1752 · 38rE IF667 · 45rE SI1609 · 36rH VS1584 · 39rE FL287 · 28rH VVS2257 · 35rF SI1209 · 30rG VVS1179 · 33rH VS2174 · 30rG SI1152 · 25rF IF127 · 27rG IF79 · 35rI VS164 · 24rG SI260 · 17rH SI156 · 19rD SI249 · 23rI SI149 · 17rI VS248 · 24rH VVS146 · 18rE SI238 · 15rF SI234 · 18rJ VS134 · 13rF FL29 · 20rJ VS224 · 10rI VVS223 · 8rJ VVS217 · 9rK VVS215 · 14rK VS112 · 7r

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

  • Cushion: a softened-corner square or rectangle with a vintage feel.
  • 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 6, 2026, the same certified diamond typically costs 44% more at a typical retailer than at the cheapest for lab-grown stones, and 20% 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 45 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.