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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 164,506 current listings.

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

The market at this size and shape

Active listings

164,506

Retailers carrying

64

Median confirmed price

$1,417

Grade combinations

30

Certificate mix:IGI 140,209 · GIA 18,255 · GCAL 3,267 · HRD 4 · AGS 3

What it actually costs

Half of these diamonds are listed between $881 and $1,722 (as of October 28, 2026).

Lower 10% $588Median $1,417Upper 10% $2,544

Middle half listed between $881 to $1,722

Certificated stones with a recently confirmed price only, 22,254 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

311%

Typical difference

$2,512

Stones compared

12,069

Across 12,069 stones of this size and shape carried by more than one retailer, the dearest listing sits 311% above the cheapest for the identical certificated diamond, a typical gap of $2,512. 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 Carat11,474 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
  4. 4NZ Jewellers7,940 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. 5Aurelinne7,502 in stock
    United States·Founded 2021·30-day returns·Ships to United States
    Terms not yet verified
    Visit Aurelinne
  8. 8

    The Perfect Carat

    6,386 in stock
    US
    Terms not yet verified
  10. 10Adiamor5,687 in stock
    United States·Founded 1999·30-day returns·Ships to United States
    Terms not yet verified
    Visit Adiamor
Show 15 more retailers
  1. 11Moon Ocean5,469 in stock
    United Kingdom·Founded 2022·30-day returns·Ships to United States
    Terms not yet verified
    Visit Moon Ocean
  2. 12B2C Jewels5,409 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
  5. 15Brilliance4,682 in stock
    United States·Founded 2002·30-day returns·Ships to United States
    Terms not yet verified
    Visit Brilliance
  9. 19RockHer4,220 in stock
    United States·Founded 2016·40-day returns·Ships to United States
    Terms not yet verified
    Visit RockHer
  10. 20Cape Diamonds4,055 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
  12. 22Yorxs3,533 in stock
    Germany·Founded 2011·100-day returns
    Terms not yet verified
    Visit Yorxs

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 VVS224,703 · 55rD VS117,978 · 58rE VS117,806 · 57rD VVS116,778 · 52rE VVS216,594 · 58rD IF13,914 · 51rF VVS210,713 · 55rF VS19,932 · 50rD FL6,221 · 39rE VVS14,706 · 53rG VS14,470 · 44rG VVS24,444 · 45rE VS23,494 · 48rD VS23,062 · 47rF VS22,031 · 44rG VS21,551 · 43rH VS11,366 · 37rE IF1,245 · 44rF VVS11,002 · 49rH VS2782 · 32rH VVS2377 · 36rF IF368 · 39rG IF265 · 32rE FL233 · 32rG VVS1170 · 40rI VS1120 · 23rH VVS157 · 20rI VVS250 · 23rH IF40 · 25rI VS232 · 19r

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 12,069 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 311%, about $2,512.

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.