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Carat Hunter · Where to buy diamonds

Where to buy a 0.5ct lab-grown marquise diamond

Every retailer in our index stocking this size and shape, 60 of them, across 28,577 current listings.

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

The market at this size and shape

Active listings

28,577

Retailers carrying

60

Median confirmed price

$230

Grade combinations

37

Certificate mix:IGI 26,164 · GCAL 131 · GIA 94

What it actually costs

Half of these diamonds are listed between $136 and $372 (as of November 7, 2026).

Lower 10% $122Median $230Upper 10% $469

Middle half listed between $136 to $372

Certificated stones with a recently confirmed price only, 2,400 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.

  1. 1Rare Carat2,060 in stock
    United States·Founded 2016·GCAL, GIA, IGI·30-day returns·Ships to United States
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  2. 2Aurelinne1,938 in stock
    United States·Founded 2021·GCAL, GIA, IGI·Ships to United States
    Terms not yet verified
    Visit Aurelinne
  3. 3Carbon Sparkle1,868 in stock
    United States·GCAL, GIA, IGI·21-day returns·Ships to United States
    Terms read on the retailer’s own site, September 2, 2026
    Visit Carbon Sparkle
  4. 4NZ Jewellers1,768 in stock
    New Zealand·Founded 2006·GCAL, GIA, IGI·30-day returns·Ships to United States
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
  6. 6

    The Perfect Carat

    1,553 in stock
    US·GCAL, GIA, IGI·Ships to United States
    Terms not yet verified
Show 50 more retailers
  1. 11B2C Jewels983 in stock
    United States·Founded 2004·GIA, IGI·30-day returns·Ships to United States
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  4. 14Cape Diamonds835 in stock
    South Africa·Founded 2005·GIA, IGI·7-day returns·Ships to United States
    Terms read on the retailer’s own site, June 15, 2026
    Visit Cape Diamonds
  5. 15Yorxs813 in stock
    Germany·Founded 2011·GIA, IGI
    Terms not yet verified
    Visit Yorxs
  6. 16

    SkyGem

    759 in stock
    AU·GCAL, GIA, IGI
    Terms not yet verified
  14. 24

    Luvansh

    421 in stock
    US·Ships to United States
    Terms not yet verified
  15. 25

    Steven Stone

    399 in stock
    UK·GIA, IGI
    Terms not yet verified
  23. 33GemsNY292 in stock
    United States·Founded 1988·IGI·Ships to United States
    Terms not yet verified
    Visit GemsNY
  24. 34

    deBebians

    292 in stock
    US·IGI·Ships to United States
    Terms not yet verified
  25. 35

    Liori Diamonds

    285 in stock
    US·IGI·Ships to United States
    Terms not yet verified
  27. 37

    Reeds

    262 in stock
    US·GCAL, IGI·Ships to United States
    Terms not yet verified
  29. 39

    SJ Gems

    252 in stock
    ZA·IGI
    Terms not yet verified
  30. 40Adiamor235 in stock
    United States·Founded 1999·GCAL, IGI·Ships to United States
    Terms not yet verified
    Visit Adiamor
  31. 41Allurez217 in stock
    United States·Founded 2010·IGI·Ships to United States
    Terms not yet verified
    Visit Allurez
  32. 42

    Keyzar

    214 in stock
    US·IGI·Ships to United States
    Terms not yet verified
  36. 46Blue Nile29 in stock
    United States·Founded 1999·GCAL, IGI·Ships to United States
    Terms not yet verified
    Visit Blue Nile
  38. 48Zales28 in stock
    United States·Founded 1924·GCAL, IGI·Ships to United States
    Terms not yet verified
    Visit Zales
  40. 50Jared19 in stock
    United States·Founded 1993·GCAL, IGI·Ships to United States
    Terms not yet verified
    Visit Jared
  41. 51Shane Co19 in stock
    United States·Founded 1971·IGI·Ships to United States
    Terms not yet verified
    Visit Shane Co
  42. 52

    USA Jewels

    15 in stock
    US·IGI·Ships to United States
    Terms not yet verified
  47. 57Ritani1 in stock
    United States·Founded 1999·GIA·Ships to United States
    Terms not yet verified
    Visit Ritani
  48. 58RockHer1 in stock
    United States·Founded 2016·GIA·Ships to United States
    Terms not yet verified
    Visit RockHer
  49. 59

    Velur

    1 in stock
    DE·GIA
    Terms not yet verified
  50. 60ZCOVA1 in stock
    Malaysia·Founded 2015·IGI·Ships to United States
    Terms not yet verified
    Visit ZCOVA

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.

47 of the 55 retailers with shipping details ship to United States. 8 do not. 5 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 VVS19,338 · 45rD VVS24,322 · 44rD VS11,875 · 47rE VVS11,714 · 43rE VVS21,691 · 40rD IF1,591 · 41rE VS11,446 · 45rG VS1597 · 28rF VVS2564 · 38rF VS1557 · 28rF VS2493 · 26rD FL453 · 32rD VS2443 · 38rH VS1417 · 24rE VS2394 · 29rH VS2387 · 19rE IF328 · 38rG VVS2281 · 26rG VS2268 · 22rH SI1185 · 15rH VVS2175 · 27rF VVS1161 · 35rE SI1142 · 23rE FL100 · 28rD SI197 · 25rG SI193 · 16rF SI190 · 19rI VS168 · 14rI SI163 · 13rI VS246 · 15rF SI235 · 20rI SI231 · 11rI VVS229 · 14rH SI227 · 11rE SI219 · 15rJ VS115 · 15rG SI214 · 12r

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 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 37 color 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.