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Carat Hunter · Where to buy diamonds

Where to buy a 1.5ct lab-grown marquise diamond

Every retailer in our index stocking this size and shape, 63 of them, across 140,304 current listings.

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

The market at this size and shape

Active listings

140,304

Retailers carrying

63

Median confirmed price

A$548

Grade combinations

39

Certificate mix:IGI 135,756 · GCAL 781 · GIA 306 · HRD 11

What it actually costs

Half of these diamonds are listed between A$380 and A$918 (as of November 6, 2026).

Lower 10% A$363Median A$548Upper 10% A$1,700

Middle half listed between A$380 to A$918

Certificated stones with a recently confirmed price only, 11,576 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

As of November 5, 2026, the same certified diamond typically costs 44% more at a typical retailer than at the cheapest for lab-grown stones, and 19% 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.

  1. 1Rare Carat9,307 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
  6. 6Carbon Sparkle5,729 in stock
    United States·GCAL, GIA, IGI·21-day returns·Ships to Australia
    Terms read on the retailer’s own site, September 2, 2026
    Visit Carbon Sparkle
  7. 7NZ Jewellers5,705 in stock
    New Zealand·Founded 2006·GCAL, GIA, IGI·30-day returns·Ships to Australia
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
Show 53 more retailers
  2. 12

    The Perfect Carat

    4,789 in stock
    US·GCAL, GIA, IGI
    Terms not yet verified
  3. 13Aurelinne4,592 in stock
    United States·Founded 2021·GCAL, GIA, IGI·Ships to Australia
    Terms not yet verified
    Visit Aurelinne
  4. 14Adiamor4,413 in stock
    United States·Founded 1999·GCAL, GIA, IGI
    Terms not yet verified
    Visit Adiamor
  5. 15B2C Jewels4,293 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. 18GemsNY3,163 in stock
    United States·Founded 1988·GCAL, GIA, IGI·Ships to Australia
    Terms not yet verified
    Visit GemsNY
  10. 20Cape Diamonds2,779 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
  14. 24Yorxs2,688 in stock
    Germany·Founded 2011·GIA, IGI
    Terms not yet verified
    Visit Yorxs
  16. 26RockHer2,607 in stock
    United States·Founded 2016·GIA, IGI·Ships to Australia
    Terms not yet verified
    Visit RockHer
  26. 36

    GemTrove

    839 in stock
    AU·GCAL, IGI·Ships to Australia
    Terms not yet verified
  30. 40Blue Nile421 in stock
    United States·Founded 1999·GCAL, GIA, IGI·Ships to Australia
    Terms not yet verified
    Visit Blue Nile
  33. 43Allurez188 in stock
    United States·Founded 2010·IGI·Ships to Australia
    Terms not yet verified
    Visit Allurez
  34. 44ZCOVA148 in stock
    Malaysia·Founded 2015·IGI·Ships to Australia
    Terms not yet verified
    Visit ZCOVA
  40. 5025karats38 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
  42. 52Jared30 in stock
    United States·Founded 1993·GCAL, GIA, IGI
    Terms not yet verified
    Visit Jared
  44. 54Zales25 in stock
    United States·Founded 1924·GCAL, GIA, IGI
    Terms not yet verified
    Visit Zales
  46. 56VRAI23 in stock
    United States·Founded 2014·IGI·Ships to Australia
    Terms not yet verified
    Visit VRAI
  49. 59

    Whiteflash

    9 in stock
    US·IGI
    Terms not yet verified
  53. 63

    Lauren B

    1 in stock
    US
    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 59 retailers with shipping details ship to Australia. 20 do not. 4 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.

E VVS225,385 · 58rD VVS218,404 · 58rE VS116,136 · 55rD VVS112,841 · 57rD VS110,902 · 53rF VVS29,455 · 55rD FL8,305 · 43rE VVS17,879 · 53rD IF7,878 · 48rF VS16,269 · 51rE VS25,594 · 46rD VS22,370 · 48rF VVS11,705 · 51rE IF1,459 · 45rG VVS21,443 · 43rF VS21,363 · 42rG VS1816 · 39rE FL620 · 35rF IF170 · 31rG VS2166 · 33rE SI1164 · 26rD SI1163 · 25rH VS1151 · 24rF SI1107 · 22rG IF105 · 28rG VVS199 · 29rH VVS265 · 16rH VS241 · 14rG SI134 · 16rI SI132 · 12rH VVS129 · 6rK SI121 · 11rI VS220 · 15rF FL17 · 17rI VVS215 · 6rI SI213 · 12rH SI211 · 11rK VS111 · 11rK VS210 · 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

  • 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?

As of November 5, 2026, the same certified diamond typically costs 44% more at a typical retailer than at the cheapest for lab-grown stones, and 19% 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 39 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.