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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 34,545 current listings.

Updated November 3, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

34,545

Retailers carrying

56

Median confirmed price

CA$1,370

Grade combinations

28

Certificate mix:IGI 28,663 · GIA 5,142 · HRD 55 · GCAL 22

What it actually costs

Half of these diamonds are listed between CA$977 and CA$2,017 (as of November 3, 2026).

Lower 10% CA$767Median CA$1,370Upper 10% CA$3,355

Middle half listed between CA$977 to CA$2,017

Certificated stones with a recently confirmed price only, 3,669 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

287%

Typical difference

CA$3,469

Stones compared

3,039

Across 3,039 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 CA$3,469. 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 Canada
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
  6. 6Adiamor1,615 in stock
    United States·Founded 1999·30-day returns·Ships to Canada
    Terms not yet verified
    Visit Adiamor
  7. 7Aurelinne1,549 in stock
    United States·Founded 2021·30-day returns·Ships to Canada
    Terms not yet verified
    Visit Aurelinne
  8. 8

    The Perfect Carat

    1,541 in stock
    US
    Terms not yet verified
  10. 10B2C Jewels1,498 in stock
    United States·Founded 2004·30-day returns·Ships to Canada
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
Show 15 more retailers
  3. 13RockHer1,231 in stock
    United States·Founded 2016·40-day returns·Ships to Canada
    Terms not yet verified
    Visit RockHer

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 Canada. 6 do not.

Narrow it down by grade

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

E VS15,362 · 51rD VS15,329 · 49rE VVS25,173 · 49rD VVS24,869 · 51rF VVS22,119 · 46rF VS11,875 · 46rD VVS11,721 · 46rE VVS11,388 · 43rG VS11,083 · 43rE VS21,040 · 43rD IF1,024 · 47rD FL617 · 33rD VS2581 · 40rF VS2460 · 40rG VVS2408 · 40rF VVS1375 · 39rG VS2323 · 34rE IF257 · 32rH VVS2133 · 27rH VS1114 · 26rG VVS169 · 28rE FL58 · 23rH VS243 · 23rI VVS233 · 14rI VS132 · 17rH 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 3,039 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 287%, about CA$3,469.

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.