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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, 56 of them, across 34,462 current listings.

Updated November 2, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

34,462

Retailers carrying

56

Median confirmed price

$982

Grade combinations

28

Certificate mix:IGI 28,499 · GIA 5,235 · HRD 55 · GCAL 22

What it actually costs

Half of these diamonds are listed between $702 and $1,443 (as of November 2, 2026).

Lower 10% $549Median $982Upper 10% $2,408

Middle half listed between $702 to $1,443

Certificated stones with a recently confirmed price only, 3,643 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

289%

Typical difference

$2,500

Stones compared

3,024

Across 3,024 stones of this size and shape carried by more than one retailer, the dearest listing sits 289% above the cheapest for the identical certificated diamond, a typical gap of $2,500. 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 Jewellers1,848 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. 6Adiamor1,599 in stock
    United States·Founded 1999·30-day returns·Ships to United States
    Terms not yet verified
    Visit Adiamor
  7. 7

    The Perfect Carat

    1,541 in stock
    US
    Terms not yet verified
  8. 8Aurelinne1,524 in stock
    United States·Founded 2021·30-day returns·Ships to United States
    Terms not yet verified
    Visit Aurelinne
  9. 9B2C Jewels1,498 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. 11Brilliance1,332 in stock
    United States·Founded 2002·30-day returns·Ships to United States
    Terms not yet verified
    Visit Brilliance
  3. 13RockHer1,228 in stock
    United States·Founded 2016·40-day returns·Ships to United States
    Terms not yet verified
    Visit RockHer
  4. 14Moon Ocean1,088 in stock
    United Kingdom·Founded 2022·30-day returns·Ships to United States
    Terms not yet verified
    Visit Moon Ocean
  12. 22Cape Diamonds775 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 are updated daily. 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 VS15,401 · 51rD VS15,342 · 48rE VVS25,109 · 48rD VVS24,880 · 51rF VVS22,106 · 46rF VS11,849 · 46rD VVS11,720 · 46rE VVS11,361 · 43rG VS11,085 · 43rE VS21,041 · 43rD IF1,010 · 47rD FL614 · 33rD VS2596 · 40rF VS2459 · 40rG VVS2395 · 38rF VVS1374 · 39rG VS2324 · 34rE IF256 · 32rH VVS2133 · 27rH VS1115 · 26rG VVS169 · 28rE FL58 · 23rH VS243 · 23rI VS132 · 17rI VVS231 · 14rH VVS122 · 22rF IF22 · 18rG 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 3,024 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 289%, about $2,500.

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.