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Carat Hunter · Where to buy diamonds

Where to buy a 1.5ct lab-grown radiant diamond

Every retailer in our index stocking this size and shape, 62 of them, across 128,020 current listings.

Updated October 30, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

128,020

Retailers carrying

62

Median confirmed price

£485

Grade combinations

29

Certificate mix:IGI 114,700 · GIA 8,137 · GCAL 1,484 · HRD 6

What it actually costs

Half of these diamonds are listed between £221 and £576 (as of October 30, 2026).

Lower 10% £178Median £485Upper 10% £779

Middle half listed between £221 to £576

Certificated stones with a recently confirmed price only, 17,398 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

428%

Typical difference

£1,000

Stones compared

8,855

Across 8,855 stones of this size and shape carried by more than one retailer, the dearest listing sits 428% above the cheapest for the identical certificated diamond, a typical gap of £1,000. 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. 2Rare Carat6,869 in stock
    United States·Founded 2016·30-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  4. 4NZ Jewellers6,635 in stock
    New Zealand·Founded 2006·30-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
  6. 6Aurelinne6,006 in stock
    United States·Founded 2021·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Aurelinne
  7. 7

    The Perfect Carat

    5,691 in stock
    US
    Terms not yet verified
  9. 9Moon Ocean4,853 in stock
    United Kingdom·Founded 2022·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Moon Ocean
  10. 10B2C Jewels4,804 in stock
    United States·Founded 2004·30-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
Show 15 more retailers
  3. 13Adiamor4,297 in stock
    United States·Founded 1999·30-day returns
    Terms not yet verified
    Visit Adiamor
  6. 16Brilliance4,079 in stock
    United States·Founded 2002·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Brilliance
  10. 20Cape Diamonds3,156 in stock
    South Africa·Founded 2005·7-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, June 15, 2026
    Visit Cape Diamonds
  11. 21Yorxs2,561 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 United Kingdom. 8 do not.

Narrow it down by grade

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

D VVS217,600 · 56rD VS117,465 · 57rE VVS215,591 · 58rD VVS114,974 · 52rE VS113,097 · 54rD IF6,633 · 48rE VVS16,261 · 51rF VS15,432 · 51rF VVS25,166 · 51rG VS14,248 · 47rD VS23,189 · 45rE VS23,186 · 44rD FL2,621 · 40rG VVS22,282 · 47rE IF1,676 · 49rF VS21,612 · 45rH VS11,582 · 38rG VS21,500 · 41rF VVS11,396 · 45rH VVS2790 · 39rE FL389 · 35rH VS2327 · 33rF IF277 · 39rG IF192 · 31rG VVS1189 · 36rI VS1149 · 27rI VVS265 · 21rH IF53 · 31rI VS249 · 23r

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 8,855 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 428%, about £1,000.

Can I see retailers for one exact grade?

Yes. Each of the 29 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.