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Carat Hunter · Where to buy diamonds

Where to buy a 1ct lab-grown cushion diamond

Every retailer in our index stocking this size and shape, 74 of them, across 143,909 current listings.

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

The market at this size and shape

Active listings

143,909

Retailers carrying

74

Median confirmed price

A$408

Grade combinations

40

Certificate mix:IGI 139,367 · GIA 1,582 · GCAL 849 · HRD 25

What it actually costs

Half of these diamonds are listed between A$291 and A$632 (as of November 7, 2026).

Lower 10% A$271Median A$408Upper 10% A$1,016

Middle half listed between A$291 to A$632

Certificated stones with a recently confirmed price only, 17,754 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.

  5. 5Adiamor7,758 in stock
    United States·Founded 1999·GCAL, GIA, IGI
    Terms not yet verified
    Visit Adiamor
  6. 6B2C Jewels7,495 in stock
    United States·Founded 2004·GIA, IGI·30-day returns·Ships to Australia
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  8. 8Rare Carat6,813 in stock
    United States·Founded 2016·GCAL, GIA, IGI·30-day returns·Ships to Australia
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  10. 10Yorxs5,957 in stock
    Germany·Founded 2011·GIA, IGI
    Terms not yet verified
    Visit Yorxs
Show 64 more retailers
  1. 11

    Luvansh

    5,891 in stock
    US
    Terms not yet verified
  4. 14Cape Diamonds5,156 in stock
    South Africa·Founded 2005·GIA, IGI·7-day returns·Ships to Australia
    Terms read on the retailer’s own site, June 15, 2026
    Visit Cape Diamonds
  5. 15

    Steven Stone

    4,457 in stock
    UK·GCAL, GIA, IGI
    Terms not yet verified
  18. 28GemsNY1,528 in stock
    United States·Founded 1988·GCAL, GIA, IGI·Ships to Australia
    Terms not yet verified
    Visit GemsNY
  20. 30

    SJ Gems

    1,149 in stock
    ZA·GIA, IGI
    Terms not yet verified
  25. 35

    Reeds

    584 in stock
    US·GCAL, IGI
    Terms not yet verified
  26. 36RockHer552 in stock
    United States·Founded 2016·GIA, IGI·Ships to Australia
    Terms not yet verified
    Visit RockHer
  28. 38Blue Nile408 in stock
    United States·Founded 1999·GCAL, GIA, IGI·Ships to Australia
    Terms not yet verified
    Visit Blue Nile
  31. 41Allurez331 in stock
    United States·Founded 2010·IGI·Ships to Australia
    Terms not yet verified
    Visit Allurez
  35. 45

    Keyzar

    278 in stock
    US·GIA, IGI
    Terms not yet verified
  36. 46

    Liori Diamonds

    267 in stock
    US·GIA, IGI
    Terms not yet verified
  38. 48

    deBebians

    208 in stock
    US·GIA, IGI
    Terms not yet verified
  40. 50Jared189 in stock
    United States·Founded 1993·GCAL, GIA, IGI
    Terms not yet verified
    Visit Jared
  41. 51

    The Perfect Carat

    181 in stock
    US·GIA, HRD, IGI
    Terms not yet verified
  42. 52Zales170 in stock
    United States·Founded 1924·GCAL, GIA, IGI
    Terms not yet verified
    Visit Zales
  43. 53Carbon Sparkle134 in stock
    United States·GIA, HRD, IGI·21-day returns·Ships to Australia
    Terms read on the retailer’s own site, September 2, 2026
    Visit Carbon Sparkle
  44. 54NZ Jewellers134 in stock
    New Zealand·Founded 2006·GIA, HRD, IGI·30-day returns·Ships to Australia
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
  45. 55Aurelinne125 in stock
    United States·Founded 2021·GIA, HRD, IGI·Ships to Australia
    Terms not yet verified
    Visit Aurelinne
  46. 56ZCOVA119 in stock
    Malaysia·Founded 2015·IGI·Ships to Australia
    Terms not yet verified
    Visit ZCOVA
  49. 59

    Washington Diamond

    71 in stock
    US·GIA, IGI
    Terms not yet verified
  52. 62

    GemTrove

    62 in stock
    AU·GIA, IGI·Ships to Australia
    Terms not yet verified
  53. 6325karats26 in stock
    United States·Founded 2008·IGI·60-day returns·Ships to Australia
    Terms read on the retailer’s own site, June 15, 2026
    Visit 25karats
  54. 64

    Distinctive Gem

    21 in stock
    US·IGI
    Terms not yet verified
  57. 67

    Whiteflash

    3 in stock
    US·GIA, IGI
    Terms not yet verified
  59. 69

    Laura Preshong

    2 in stock
    US·GCAL
    Terms not yet verified
  60. 70

    Lauren B

    2 in stock
    US
    Terms not yet verified
  62. 72

    Robbins Brothers

    2 in stock
    US·IGI
    Terms not yet verified
  63. 73VRAI2 in stock
    United States·Founded 2014·Ships to Australia
    Terms not yet verified
    Visit VRAI
  64. 74

    Diamovida

    1 in stock
    CA·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.

39 of the 58 retailers with shipping details ship to Australia. 19 do not. 16 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 VVS231,979 · 61rD VS122,492 · 58rE VS118,367 · 58rD VVS117,707 · 58rE VVS215,786 · 59rE VVS16,289 · 56rD VS25,096 · 53rE VS24,576 · 51rF VS14,050 · 54rF VVS23,593 · 58rD IF2,965 · 51rD FL2,187 · 40rF VS21,401 · 44rE IF1,204 · 45rG VS11,123 · 43rG VVS2905 · 47rF VVS1884 · 52rE SI1596 · 38rE FL470 · 30rD SI1427 · 36rG VS2402 · 31rH VS1254 · 29rF SI1202 · 26rH VVS2170 · 30rF IF117 · 37rG VVS1106 · 30rH VS2104 · 20rE SI263 · 22rG SI154 · 20rI VS141 · 20rD SI240 · 16rF FL35 · 21rI VS229 · 14rJ VS129 · 14rH VVS126 · 14rH SI124 · 15rI VVS220 · 14rK VVS218 · 12rG FL13 · 13rI SI110 · 10r

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 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 40 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.