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Carat Hunter · Where to buy diamonds

Where to buy a 3ct natural marquise diamond

Every retailer in our index stocking this size and shape, 66 of them, across 6,587 current listings.

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

The market at this size and shape

Active listings

6,587

Retailers carrying

66

Median confirmed price

A$53,479

Grade combinations

52

Certificate mix:GIA 4,955 · IGI 880 · HRD 431

What it actually costs

Half of these diamonds are listed between A$35,294 and A$69,040 (as of November 6, 2026).

Lower 10% A$25,137Median A$53,479Upper 10% A$87,865

Middle half listed between A$35,294 to A$69,040

Certificated stones with a recently confirmed price only, 539 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.

  1. 1NZ Jewellers407 in stock
    New Zealand·Founded 2006·EGL, GIA, HRD, IGI·30-day returns·Ships to Australia
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
  2. 2Carbon Sparkle365 in stock
    United States·EGL, GIA, HRD, IGI·21-day returns·Ships to Australia
    Terms read on the retailer’s own site, September 2, 2026
    Visit Carbon Sparkle
  3. 3Aurelinne337 in stock
    United States·Founded 2021·EGL, GIA, HRD, IGI·Ships to Australia
    Terms not yet verified
    Visit Aurelinne
  6. 6Yorxs300 in stock
    Germany·Founded 2011·GIA, HRD, IGI
    Terms not yet verified
    Visit Yorxs
  7. 7Rare Carat282 in stock
    United States·Founded 2016·GIA, IGI·30-day returns·Ships to Australia
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  8. 8

    The Perfect Carat

    280 in stock
    US·EGL, GIA, HRD, IGI
    Terms not yet verified
  9. 9B2C Jewels223 in stock
    United States·Founded 2004·GIA, HRD, IGI·30-day returns·Ships to Australia
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
Show 56 more retailers
  14. 24Cape Diamonds94 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
  16. 26Allurez89 in stock
    United States·Founded 2010·GIA·Ships to Australia
    Terms not yet verified
    Visit Allurez
  17. 27RockHer88 in stock
    United States·Founded 2016·GIA, IGI·Ships to Australia
    Terms not yet verified
    Visit RockHer
  20. 30Zales85 in stock
    United States·Founded 1924·GIA
    Terms not yet verified
    Visit Zales
  22. 32Jared81 in stock
    United States·Founded 1993·GIA
    Terms not yet verified
    Visit Jared
  42. 52GemsNY13 in stock
    United States·Founded 1988·GIA, IGI·Ships to Australia
    Terms not yet verified
    Visit GemsNY
  45. 55

    GemTrove

    11 in stock
    AU·GIA, HRD, IGI·Ships to Australia
    Terms not yet verified
  49. 59

    Lauren B

    3 in stock
    US
    Terms not yet verified
  50. 60

    Distinctive Gem

    2 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.

42 of the 62 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.

D SI1491 · 53rG SI2481 · 46rD SI2446 · 47rJ SI2359 · 43rI SI2347 · 40rH SI2296 · 47rF SI2248 · 40rI SI1242 · 40rE SI2193 · 42rF SI1182 · 48rD VS2177 · 46rG SI1161 · 45rH SI1156 · 41rD VS1154 · 48rE SI1153 · 45rK SI2141 · 32rF VS2139 · 45rJ SI1136 · 40rG VS2116 · 40rI VS2114 · 30rI VVS1111 · 37rI VVS2110 · 39rF VS1109 · 40rH VS2109 · 36rE VS1103 · 47rI VS1102 · 27rK SI191 · 32rD FL86 · 26rH VVS181 · 41rE VS277 · 37rG VVS176 · 38rD IF71 · 28rF IF62 · 38rG VS162 · 40rH VS162 · 29rD VVS149 · 32rJ IF44 · 26rJ VS242 · 22rF VVS137 · 22rF VVS233 · 23rH VVS233 · 25rI IF32 · 23rJ VVS232 · 24rJ VS131 · 16rG IF29 · 25rK VS228 · 16rH IF26 · 17rK IF23 · 19rD VVS222 · 18rJ VVS122 · 21rE IF16 · 12rK VS111 · 11r

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.
  • Natural: mined diamonds with the certification, provenance and resale profile traditional buyers expect.

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 52 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.