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Carat Hunter · Where to buy diamonds

Where to buy a 3ct lab-grown radiant diamond

Every retailer in our index stocking this size and shape, 67 of them, across 176,945 current listings.

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

The market at this size and shape

Active listings

176,945

Retailers carrying

67

Median confirmed price

$1,391

Grade combinations

42

Certificate mix:IGI 150,381 · GIA 18,919 · GCAL 3,682 · HRD 4 · AGS 3

What it actually costs

Half of these diamonds are listed between $819 and $1,704 (as of November 6, 2026).

Lower 10% $572Median $1,391Upper 10% $2,379

Middle half listed between $819 to $1,704

Certificated stones with a recently confirmed price only, 23,418 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. 1Rare Carat11,363 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. 2Carbon Sparkle9,833 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
  3. 3NZ Jewellers9,665 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
  4. 4Aurelinne8,714 in stock
    United States·Founded 2021·GCAL, GIA, IGI·Ships to United States
    Terms not yet verified
    Visit Aurelinne
  5. 5

    The Perfect Carat

    8,371 in stock
    US·GCAL, GIA, IGI·Ships to United States
    Terms not yet verified
  9. 9Adiamor6,409 in stock
    United States·Founded 1999·GCAL, GIA, IGI·Ships to United States
    Terms not yet verified
    Visit Adiamor
Show 57 more retailers
  3. 13B2C Jewels5,316 in stock
    United States·Founded 2004·GCAL, GIA, IGI·30-day returns·Ships to United States
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  5. 15RockHer4,993 in stock
    United States·Founded 2016·GIA, IGI·Ships to United States
    Terms not yet verified
    Visit RockHer
  11. 21Yorxs4,004 in stock
    Germany·Founded 2011·GIA, IGI
    Terms not yet verified
    Visit Yorxs
  14. 24Cape Diamonds3,416 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
  18. 28The Diamond Guys2,721 in stock
    United States·Founded 2005·GCAL, GIA, IGI·15-day returns·Ships to United States
    Terms read on the retailer’s own site, June 15, 2026
    Visit The Diamond Guys
  20. 30GemsNY2,011 in stock
    United States·Founded 1988·GCAL, GIA, IGI·Ships to United States
    Terms not yet verified
    Visit GemsNY
  27. 37Blue Nile1,157 in stock
    United States·Founded 1999·GCAL, GIA, IGI·Ships to United States
    Terms not yet verified
    Visit Blue Nile
  29. 39Allurez459 in stock
    United States·Founded 2010·GIA, IGI·Ships to United States
    Terms not yet verified
    Visit Allurez
  33. 43Zales323 in stock
    United States·Founded 1924·AGS, GCAL, GIA, IGI·Ships to United States
    Terms not yet verified
    Visit Zales
  34. 44Jared322 in stock
    United States·Founded 1993·AGS, GCAL, GIA, IGI·Ships to United States
    Terms not yet verified
    Visit Jared
  39. 49

    Washington Diamond

    125 in stock
    US·GIA, IGI·Ships to United States
    Terms not yet verified
  40. 50Shane Co91 in stock
    United States·Founded 1971·IGI·Ships to United States
    Terms not yet verified
    Visit Shane Co
  44. 5425karats39 in stock
    United States·Founded 2008·IGI·60-day returns·Ships to United States
    Terms read on the retailer’s own site, June 15, 2026
    Visit 25karats
  46. 56ZCOVA26 in stock
    Malaysia·Founded 2015·IGI·Ships to United States
    Terms not yet verified
    Visit ZCOVA
  47. 57

    Robbins Brothers

    23 in stock
    US·IGI·Ships to United States
    Terms not yet verified
  48. 58

    GemTrove

    13 in stock
    AU·IGI
    Terms not yet verified
  50. 60

    Whiteflash

    8 in stock
    US·GIA, IGI·Ships to United States
    Terms not yet verified
  51. 61VRAI7 in stock
    United States·Founded 2014·Ships to United States
    Terms not yet verified
    Visit VRAI
  52. 62

    Lauren B

    3 in stock
    US·Ships to United States
    Terms not yet verified
  53. 63

    Diamond Culture

    2 in stock
    HK·IGI
    Terms not yet verified
  55. 65

    Diamovida

    2 in stock
    CA·IGI
    Terms not yet verified
  56. 66

    Good Old Gold

    1 in stock
    US·IGI·Ships to United States
    Terms not yet verified
  57. 67RDI Diamonds1 in stock
    United States·Founded 1992·IGI·Ships to United States
    Terms read on the retailer’s own site, June 15, 2026
    Visit RDI Diamonds

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.

54 of the 63 retailers with shipping details ship to United States. 9 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 VVS226,565 · 54rE VVS220,411 · 60rE VS119,528 · 57rD VS117,950 · 59rD VVS117,705 · 52rD IF14,608 · 51rF VVS211,141 · 55rF VS110,043 · 53rD FL6,518 · 39rE VVS15,011 · 53rG VS14,727 · 46rG VVS24,425 · 45rE VS23,917 · 49rD VS22,977 · 48rF VS22,044 · 45rG VS21,569 · 41rH VS11,399 · 36rE IF1,296 · 45rF VVS11,130 · 49rH VS2796 · 36rH VVS2405 · 35rE SI1387 · 34rF IF374 · 41rF SI1274 · 31rG IF266 · 32rE FL246 · 32rG VVS1193 · 41rG SI1187 · 33rD SI1178 · 25rH SI1124 · 26rI VS1117 · 23rH VVS176 · 23rJ VS261 · 24rI SI151 · 28rJ VS144 · 22rI VVS239 · 22rH IF38 · 25rI VS236 · 19rE SI220 · 19rG SI219 · 17rJ SI115 · 15rK 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

  • Radiant: a rectangular brilliant cut that combines the emerald outline with round-style faceting.
  • 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 42 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.