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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, 53 of them, across 21,274 live listings.

Updated September 14, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

21,274

Retailers carrying

53

Median active price

$1,060

Grade combinations

27

Certificate mix:IGI 18,047 · GIA 2,896 · HRD 19 · GCAL 10

What it actually costs

Lower 10% $648Median $1,060Upper 10% $2,576

Middle half sell between $817 to $1,672

Certificated stones with a live price only, 5,992 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

213%

Typical difference

$1,928

Stones compared

3,841

Across 3,841 stones of this size and shape carried by more than one retailer, the dearest listing sits 213% above the cheapest for the identical certificated diamond, a typical gap of $1,928. 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. 2Adiamor1,853 in stock
    United States·Founded 1999·30-day returns·Ships to United States
    Visit Adiamor
  10. 10RockHer922 in stock
    United States·Founded 2016·40-day returns·Ships to United States
    Visit RockHer
Show 15 more retailers
  12. 22

    GemTrove

    266 in stock
    AU

Stock counts are updated daily. Founded, return window and shipping details are retailer-provided and were last verified September 2, 2026.

14 of the 25 retailers ship to United States. 11 do not.

Narrow it down by grade

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

D VS13,494 · 36rE VS13,338 · 37rD VVS23,073 · 44rE VVS23,073 · 39rF VVS21,389 · 34rD VVS11,047 · 36rF VS11,035 · 35rE VVS1791 · 34rG VS1698 · 30rE VS2530 · 31rD IF467 · 39rD FL353 · 23rD VS2324 · 28rG VVS2317 · 27rG VS2284 · 28rF VS2249 · 27rF VVS1239 · 30rE IF162 · 25rH VS1102 · 19rH VVS289 · 19rG VVS157 · 20rH VS243 · 19rE FL35 · 14rI VS126 · 12rI VVS221 · 14rH VVS115 · 15rG IF14 · 13r

Stones at this spec now

Live 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 60% to 80% less than a comparable natural cohort.

Frequently asked

How much do retailers differ on the same diamond?

Across 3,841 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 213%, about $1,928.

Can I see retailers for one exact grade?

Yes. Each of the 27 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?

Live listings refresh daily. 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.

Where to Buy 3ct Lab Grown Heart Diamonds | Carat Hunter