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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 165,593 current listings.

Updated October 29, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

165,593

Retailers carrying

64

Median confirmed price

A$2,019

Grade combinations

30

Certificate mix:IGI 141,077 · GIA 18,344 · GCAL 3,318 · HRD 4 · AGS 3

What it actually costs

Half of these diamonds are listed between A$1,255 and A$2,454 (as of October 29, 2026).

Lower 10% A$839Median A$2,019Upper 10% A$3,633

Middle half listed between A$1,255 to A$2,454

Certificated stones with a recently confirmed price only, 22,263 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

315%

Typical difference

A$3,598

Stones compared

11,952

Across 11,952 stones of this size and shape carried by more than one retailer, the dearest listing sits 315% above the cheapest for the identical certificated diamond, a typical gap of A$3,598. 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 Carat11,612 in stock
    United States·Founded 2016·30-day returns·Ships to Australia
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  2. 2NZ Jewellers8,257 in stock
    New Zealand·Founded 2006·30-day returns·Ships to Australia
    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 Australia
    Terms not yet verified
    Visit Aurelinne
  7. 7

    The Perfect Carat

    6,611 in stock
    US
    Terms not yet verified
  9. 9Adiamor5,798 in stock
    United States·Founded 1999·30-day returns
    Terms not yet verified
    Visit Adiamor
Show 15 more retailers
  3. 13B2C Jewels5,303 in stock
    United States·Founded 2004·30-day returns·Ships to Australia
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  8. 18RockHer4,256 in stock
    United States·Founded 2016·40-day returns·Ships to Australia
    Terms not yet verified
    Visit RockHer
  10. 20Cape Diamonds4,212 in stock
    South Africa·Founded 2005·7-day returns·Ships to Australia
    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.

17 of the 25 retailers ship to Australia. 8 do not.

Narrow it down by grade

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

D VVS224,893 · 54rE VS118,129 · 57rD VS117,956 · 58rE VVS217,122 · 58rD VVS116,998 · 52rD IF13,898 · 51rF VVS210,538 · 54rF VS19,789 · 50rD FL6,274 · 39rE VVS14,795 · 53rG VS14,532 · 45rG VVS24,370 · 45rE VS23,609 · 50rD VS22,933 · 47rF VS22,029 · 46rG VS21,545 · 43rH VS11,386 · 36rE IF1,268 · 44rF VVS11,021 · 49rH VS2785 · 34rH VVS2374 · 36rF IF369 · 39rG IF265 · 32rE FL235 · 32rG VVS1172 · 40rI VS1120 · 23rH VVS167 · 21rI VVS249 · 22rH IF40 · 25rI VS230 · 17r

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 11,952 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 315%, about A$3,598.

Can I see retailers for one exact grade?

Yes. Each of the 30 colour 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.

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