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Carat Hunter · Where to buy diamonds

Where to buy a 3ct lab-grown radiant diamond

Every retailer in our index stocking this size and shape, 64 of them, across 169,546 current listings.

Updated November 1, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

169,546

Retailers carrying

64

Median confirmed price

$1,406

Grade combinations

30

Certificate mix:IGI 144,585 · GIA 18,149 · GCAL 3,350 · HRD 4 · AGS 3

What it actually costs

Half of these diamonds are listed between $854 and $1,716 (as of November 1, 2026).

Lower 10% $580Median $1,406Upper 10% $2,524

Middle half listed between $854 to $1,716

Certificated stones with a recently confirmed price only, 23,036 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

312%

Typical difference

$2,526

Stones compared

12,502

Across 12,502 stones of this size and shape carried by more than one retailer, the dearest listing sits 312% above the cheapest for the identical certificated diamond, a typical gap of $2,526. 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.

  1. 1Rare Carat11,606 in stock
    United States·Founded 2016·30-day returns·Ships to United States
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  3. 3NZ Jewellers8,804 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. 6Aurelinne7,887 in stock
    United States·Founded 2021·30-day returns·Ships to United States
    Terms not yet verified
    Visit Aurelinne
  7. 7

    The Perfect Carat

    6,568 in stock
    US
    Terms not yet verified
  9. 9Adiamor5,945 in stock
    United States·Founded 1999·30-day returns·Ships to United States
    Terms not yet verified
    Visit Adiamor
Show 15 more retailers
  1. 11B2C Jewels5,696 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
  6. 16Brilliance4,693 in stock
    United States·Founded 2002·30-day returns·Ships to United States
    Terms not yet verified
    Visit Brilliance
  7. 17RockHer4,546 in stock
    United States·Founded 2016·40-day returns·Ships to United States
    Terms not yet verified
    Visit RockHer
  8. 18Moon Ocean4,176 in stock
    United Kingdom·Founded 2022·30-day returns·Ships to United States
    Terms not yet verified
    Visit Moon Ocean
  11. 21Yorxs3,814 in stock
    Germany·Founded 2011·100-day returns
    Terms not yet verified
    Visit Yorxs
  13. 23Cape Diamonds3,300 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.

18 of the 25 retailers ship to United States. 7 do not.

Narrow it down by grade

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

D VVS225,485 · 54rE VS119,252 · 56rE VVS218,682 · 59rD VS118,073 · 58rD VVS117,126 · 52rD IF13,859 · 50rF VVS210,404 · 54rF VS19,772 · 50rD FL6,317 · 39rE VVS14,972 · 53rG VS14,536 · 46rG VVS24,265 · 45rE VS23,848 · 47rD VS23,009 · 48rF VS22,096 · 46rG VS21,575 · 43rH VS11,396 · 36rE IF1,285 · 44rF VVS11,071 · 49rH VS2786 · 35rH VVS2382 · 36rF IF371 · 39rG IF265 · 32rE FL239 · 32rG VVS1172 · 39rI VS1119 · 23rH VVS171 · 23rI VVS248 · 22rH IF40 · 25rI VS228 · 16r

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

  • Radiant: a rectangular brilliant cut that combines the emerald outline with round-style faceting.
  • 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 12,502 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 312%, about $2,526.

Can I see retailers for one exact grade?

Yes. Each of the 30 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.