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Carat Hunter · Where to buy diamonds

Where to buy a 3ct lab-grown princess diamond

Every retailer in our index stocking this size and shape, 58 of them, across 130,889 current listings.

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

The market at this size and shape

Active listings

130,889

Retailers carrying

58

Median confirmed price

$650

Grade combinations

45

Certificate mix:IGI 114,606 · GIA 8,896 · GCAL 2,412 · HRD 118

What it actually costs

Half of these diamonds are listed between $508 and $1,297 (as of November 6, 2026).

Lower 10% $450Median $650Upper 10% $3,610

Middle half listed between $508 to $1,297

Certificated stones with a recently confirmed price only, 9,187 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. 1Carbon Sparkle7,667 in stock
    United States·GCAL, GIA, GSI, HRD·21-day returns·Ships to United States
    Terms read on the retailer’s own site, September 2, 2026
    Visit Carbon Sparkle
  2. 2

    The Perfect Carat

    7,261 in stock
    US·GCAL, GIA, GSI, HRD·Ships to United States
    Terms not yet verified
  3. 3NZ Jewellers6,944 in stock
    New Zealand·Founded 2006·GCAL, GIA, GSI, HRD·30-day returns·Ships to United States
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
  5. 5Aurelinne6,595 in stock
    United States·Founded 2021·GCAL, GIA, GSI, HRD·Ships to United States
    Terms not yet verified
    Visit Aurelinne
  6. 6Rare Carat6,270 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
  8. 8Adiamor5,083 in stock
    United States·Founded 1999·GCAL, GIA, IGI·Ships to United States
    Terms not yet verified
    Visit Adiamor
Show 48 more retailers
  2. 12B2C Jewels4,360 in stock
    United States·Founded 2004·GCAL, GIA, HRD, IGI·30-day returns·Ships to United States
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  3. 13RockHer3,957 in stock
    United States·Founded 2016·GIA, IGI·Ships to United States
    Terms not yet verified
    Visit RockHer
  11. 21Cape Diamonds2,897 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
  12. 22Yorxs2,831 in stock
    Germany·Founded 2011·GIA, IGI
    Terms not yet verified
    Visit Yorxs
  19. 29GemsNY1,480 in stock
    United States·Founded 1988·GCAL, GIA, IGI·Ships to United States
    Terms not yet verified
    Visit GemsNY
  23. 33Blue Nile1,186 in stock
    United States·Founded 1999·GCAL, GIA, IGI·Ships to United States
    Terms not yet verified
    Visit Blue Nile
  28. 38Allurez778 in stock
    United States·Founded 2010·GIA, IGI·Ships to United States
    Terms not yet verified
    Visit Allurez
  31. 41Jared409 in stock
    United States·Founded 1993·GCAL, GIA, IGI·Ships to United States
    Terms not yet verified
    Visit Jared
  32. 42Zales398 in stock
    United States·Founded 1924·GCAL, GIA, IGI·Ships to United States
    Terms not yet verified
    Visit Zales
  39. 4925karats49 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
  41. 51Shane Co40 in stock
    United States·Founded 1971·IGI·Ships to United States
    Terms not yet verified
    Visit Shane Co
  44. 54ZCOVA25 in stock
    Malaysia·Founded 2015·IGI·Ships to United States
    Terms not yet verified
    Visit ZCOVA
  45. 55VRAI13 in stock
    United States·Founded 2014·IGI·Ships to United States
    Terms not yet verified
    Visit VRAI
  47. 57

    Whiteflash

    3 in stock
    US·GIA·Ships to United States
    Terms not yet verified
  48. 58

    Lauren B

    2 in stock
    US·Ships to United States
    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.

50 of the 57 retailers with shipping details ship to United States. 7 do not. 1 retailer has 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 VS124,277 · 55rE VVS223,032 · 54rF VVS214,384 · 55rD VS113,177 · 52rF VS110,421 · 52rD VVS27,896 · 54rG VS15,300 · 49rG VVS24,295 · 47rE VS23,976 · 46rD VVS13,253 · 48rE VVS13,047 · 48rD FL2,940 · 34rD IF2,800 · 46rG VS22,043 · 39rF VS21,904 · 48rF VVS11,529 · 47rH VS11,521 · 40rD VS21,351 · 43rH VVS2799 · 37rH VS2544 · 33rI VS1302 · 33rG SI1261 · 30rF SI1255 · 31rE SI1241 · 29rG VVS1202 · 35rH SI1165 · 27rE IF147 · 33rE FL125 · 29rD SI1101 · 25rI VS290 · 25rK SI181 · 11rK SI254 · 9rH VVS149 · 26rI VVS244 · 16rG SI237 · 21rJ VS134 · 18rE SI229 · 21rJ VVS229 · 16rF FL22 · 21rI SI219 · 17rK VS119 · 16rK VS219 · 10rI VVS116 · 15rH SI215 · 15rF SI214 · 13r

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

  • Princess: a square brilliant cut, second only to round in popularity.
  • 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 45 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.