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Carat Hunter · Where to buy diamonds

Where to buy a 0.5ct lab-grown radiant diamond

Every retailer in our index stocking this size and shape, 47 of them, across 38,813 current listings.

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

The market at this size and shape

Active listings

38,813

Retailers carrying

47

Median confirmed price

£171

Grade combinations

26

Certificate mix:IGI 36,999 · GCAL 181 · GIA 32 · HRD 6

What it actually costs

Half of these diamonds are listed between £98 and £294 (as of October 28, 2026).

Lower 10% £84Median £171Upper 10% £383

Middle half listed between £98 to £294

Certificated stones with a recently confirmed price only, 3,481 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

539%

Typical difference

£668

Stones compared

2,471

Across 2,471 stones of this size and shape carried by more than one retailer, the dearest listing sits 539% above the cheapest for the identical certificated diamond, a typical gap of £668. 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 Carat2,318 in stock
    United States·Founded 2016·30-day returns·Ships to Ireland
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  2. 2Aurelinne2,175 in stock
    United States·Founded 2021·30-day returns·Ships to Ireland
    Terms not yet verified
    Visit Aurelinne
  5. 5NZ Jewellers1,940 in stock
    New Zealand·Founded 2006·30-day returns·Ships to Ireland
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
  9. 9

    The Perfect Carat

    1,844 in stock
    US
    Terms not yet verified
  10. 10B2C Jewels1,573 in stock
    United States·Founded 2004·30-day returns·Ships to Ireland
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
Show 15 more retailers
  1. 11Yorxs1,515 in stock
    Germany·Founded 2011·100-day returns
    Terms not yet verified
    Visit Yorxs
  3. 13Cape Diamonds1,352 in stock
    South Africa·Founded 2005·7-day returns·Ships to Ireland
    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.

15 of the 25 retailers ship to Ireland. 10 do not.

Narrow it down by grade

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

D VVS113,829 · 43rD VVS26,460 · 39rD VS13,400 · 39rD IF3,125 · 40rE VVS22,378 · 39rE VVS11,971 · 39rE VS11,929 · 37rF VVS2855 · 35rD VS2852 · 33rG VVS2667 · 32rD FL537 · 24rE VS2520 · 30rF VS1475 · 32rG VS1468 · 29rE IF373 · 37rF VS2195 · 25rF VVS1193 · 34rG VS2186 · 27rH VS1111 · 22rE FL60 · 23rF IF54 · 24rH VS252 · 25rG VVS146 · 22rH VVS240 · 22rI VS215 · 14rI VVS113 · 13r

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 2,471 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 539%, about £668.

Can I see retailers for one exact grade?

Yes. Each of the 26 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.