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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 33,238 current listings.

Updated October 28, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

33,238

Retailers carrying

56

Median confirmed price

$989

Grade combinations

28

Certificate mix:IGI 27,235 · GIA 5,264 · HRD 55 · GCAL 22

What it actually costs

Half of these diamonds are listed between $709 and $1,457 (as of October 28, 2026).

Lower 10% $553Median $989Upper 10% $2,415

Middle half listed between $709 to $1,457

Certificated stones with a recently confirmed price only, 3,659 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

287%

Typical difference

$2,482

Stones compared

3,007

Across 3,007 stones of this size and shape carried by more than one retailer, the dearest listing sits 287% above the cheapest for the identical certificated diamond, a typical gap of $2,482. 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 Jewellers1,689 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
  5. 5Adiamor1,578 in stock
    United States·Founded 1999·30-day returns·Ships to United States
    Terms not yet verified
    Visit Adiamor
  8. 8B2C Jewels1,479 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
  9. 9Aurelinne1,414 in stock
    United States·Founded 2021·30-day returns·Ships to United States
    Terms not yet verified
    Visit Aurelinne
  10. 10

    The Perfect Carat

    1,373 in stock
    US
    Terms not yet verified
Show 15 more retailers
  1. 11Moon Ocean1,298 in stock
    United Kingdom·Founded 2022·30-day returns·Ships to United States
    Terms not yet verified
    Visit Moon Ocean
  2. 12Brilliance1,281 in stock
    United States·Founded 2002·30-day returns·Ships to United States
    Terms not yet verified
    Visit Brilliance
  3. 13RockHer1,224 in stock
    United States·Founded 2016·40-day returns·Ships to United States
    Terms not yet verified
    Visit RockHer
  11. 21Cape Diamonds792 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.

D VS15,260 · 45rE VS15,168 · 51rD VVS24,786 · 51rE VVS24,694 · 48rF VVS21,932 · 45rF VS11,763 · 45rD VVS11,681 · 45rE VVS11,332 · 43rG VS11,087 · 43rE VS21,022 · 42rD IF972 · 47rD VS2617 · 40rD FL584 · 33rF VS2443 · 39rG VVS2390 · 37rF VVS1383 · 40rG VS2335 · 34rE IF248 · 32rH VVS2133 · 27rH VS1119 · 25rG VVS168 · 27rE FL58 · 23rH VS246 · 23rI VS132 · 17rI VVS231 · 14rH VVS122 · 22rF IF17 · 16rG 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 3,007 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 287%, about $2,482.

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.