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Carat Hunter · Where to buy diamonds

Where to buy a 1.25ct lab-grown radiant diamond

Every retailer in our index stocking this size and shape, 59 of them, across 36,272 current listings.

Updated November 4, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

36,272

Retailers carrying

59

Median confirmed price

A$701

Grade combinations

28

Certificate mix:IGI 33,285 · GIA 1,652 · GCAL 476 · HRD 3

What it actually costs

Half of these diamonds are listed between A$348 and A$998 (as of November 4, 2026).

Lower 10% A$291Median A$701Upper 10% A$1,549

Middle half listed between A$348 to A$998

Certificated stones with a recently confirmed price only, 4,507 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

436%

Typical difference

A$1,501

Stones compared

2,592

Across 2,592 stones of this size and shape carried by more than one retailer, the dearest listing sits 436% above the cheapest for the identical certificated diamond, a typical gap of A$1,501. 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. 1NZ Jewellers2,237 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
  3. 3

    The Perfect Carat

    2,031 in stock
    US
    Terms not yet verified
  4. 4Rare Carat1,921 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
  7. 7Aurelinne1,676 in stock
    United States·Founded 2021·30-day returns·Ships to Australia
    Terms not yet verified
    Visit Aurelinne
Show 15 more retailers
  1. 11Adiamor1,287 in stock
    United States·Founded 1999·30-day returns
    Terms not yet verified
    Visit Adiamor
  5. 15B2C Jewels1,173 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
  9. 19Cape Diamonds868 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
  11. 21Yorxs771 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 VVS25,605 · 55rD VS14,533 · 52rD VVS14,188 · 49rE VS13,873 · 51rE VVS23,828 · 51rF VS12,308 · 50rG VS11,741 · 46rE VVS11,432 · 52rF VVS21,402 · 46rD IF1,391 · 45rE VS2959 · 45rG VVS2852 · 41rD VS2799 · 46rD FL701 · 38rE IF577 · 42rF VS2562 · 41rG VS2378 · 37rH VS1300 · 38rH VVS2257 · 29rF VVS1170 · 31rI VS1113 · 23rF IF79 · 31rE FL62 · 25rG VVS153 · 25rH VS248 · 18rI VS222 · 15rH VVS121 · 3rI VVS217 · 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 2,592 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 436%, about A$1,501.

Can I see retailers for one exact grade?

Yes. Each of the 28 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.