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Carat Hunter · Where to buy diamonds

Where to buy a 3ct lab-grown heart diamond

Every retailer in our index stocking this size and shape, 57 of them, across 35,376 current listings.

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

The market at this size and shape

Active listings

35,376

Retailers carrying

57

Median confirmed price

$962

Grade combinations

28

Certificate mix:IGI 29,293 · GIA 5,250 · HRD 55 · GCAL 23

What it actually costs

Half of these diamonds are listed between $691 and $1,443 (as of November 6, 2026).

Lower 10% $549Median $962Upper 10% $2,340

Middle half listed between $691 to $1,443

Certificated stones with a recently confirmed price only, 3,738 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Cheapest to dearest, median

290%

Cheapest to dearest, median in price

$2,474

Stones compared

3,123

Across 3,123 stones of this size and shape carried by more than one retailer, the dearest listing sits 290% above the cheapest for the identical certificated diamond, a typical gap of $2,474. That gap is what comparing before you buy avoids.

Every retailer that stocks this spec

Ranked by active inventory count. Selection is mechanical, not editorial.

  2. 2NZ Jewellers1,951 in stock
    New Zealand·Founded 2006·30-day returns·Ships to United States
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
  6. 6Adiamor1,678 in stock
    United States·Founded 1999·30-day returns·Ships to United States
    Terms not yet verified
    Visit Adiamor
  7. 7

    The Perfect Carat

    1,630 in stock
    US
    Terms not yet verified
  8. 8Aurelinne1,605 in stock
    United States·Founded 2021·30-day returns·Ships to United States
    Terms not yet verified
    Visit Aurelinne
  10. 10B2C Jewels1,429 in stock
    United States·Founded 2004·30-day returns·Ships to United States
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
Show 15 more retailers
  1. 11Brilliance1,399 in stock
    United States·Founded 2002·30-day returns·Ships to United States
    Terms not yet verified
    Visit Brilliance
  2. 12RockHer1,242 in stock
    United States·Founded 2016·40-day returns·Ships to United States
    Terms not yet verified
    Visit RockHer
  7. 17Moon Ocean1,028 in stock
    United Kingdom·Founded 2022·30-day returns·Ships to United States
    Terms not yet verified
    Visit Moon Ocean
  10. 20Cape Diamonds821 in stock
    South Africa·Founded 2005·7-day returns·Ships to United States
    Terms read on the retailer’s own site, June 15, 2026
    Visit Cape 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.

19 of the 25 retailers ship to United States. 6 do not.

Narrow it down by grade

Each combination below has its own page with the retailers that stock exactly that grade.

E VS15,503 · 52rD VS15,406 · 49rE VVS25,330 · 50rD VVS24,908 · 52rF VVS22,111 · 45rF VS12,013 · 47rD VVS11,762 · 47rE VVS11,461 · 43rG VS11,114 · 43rE VS21,063 · 43rD IF1,036 · 48rD FL632 · 34rD VS2578 · 40rF VS2484 · 40rG VVS2431 · 41rF VVS1381 · 40rG VS2338 · 34rE IF271 · 33rH VVS2135 · 28rH VS1112 · 26rG VVS168 · 28rE FL62 · 24rH VS246 · 23rI VVS235 · 14rI VS132 · 17rF IF25 · 18rH VVS124 · 22rG IF14 · 14r

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

  • Heart: a brilliant cut with a cleft and a pointed tip, classic and recognizable.
  • 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?

Across 3,123 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 290%, about $2,474.

Can I see retailers for one exact grade?

Yes. Each of the 28 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.