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Carat Hunter · Where to buy diamonds

Where to buy a 0.5ct lab-grown round diamond

Every retailer in our index stocking this size and shape, 59 of them, across 369,300 current listings.

Updated November 2, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

369,300

Retailers carrying

59

Median confirmed price

£134

Grade combinations

32

Certificate mix:IGI 350,256 · GCAL 1,003 · GIA 838 · HRD 416 · AGS 6

What it actually costs

Half of these diamonds are listed between £86 and £228 (as of November 2, 2026).

Lower 10% £69Median £134Upper 10% £309

Middle half listed between £86 to £228

Certificated stones with a recently confirmed price only, 40,349 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

437%

Typical difference

£533

Stones compared

29,776

Across 29,776 stones of this size and shape carried by more than one retailer, the dearest listing sits 437% above the cheapest for the identical certificated diamond, a typical gap of £533. 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.

  5. 5B2C Jewels24,419 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
  8. 8NZ Jewellers16,065 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
  9. 9Yorxs15,354 in stock
    Germany·Founded 2011·100-day returns
    Terms not yet verified
    Visit Yorxs
  10. 10Rare Carat15,097 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
Show 15 more retailers
  1. 11Aurelinne14,743 in stock
    United States·Founded 2021·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Aurelinne
  2. 12

    The Perfect Carat

    13,193 in stock
    US
    Terms not yet verified
  8. 18Cape Diamonds8,220 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
  14. 24GemsNY3,766 in stock
    United States·Founded 1988·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit GemsNY

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.

16 of the 25 retailers ship to United Kingdom. 9 do not.

Narrow it down by grade

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

D VVS2127,936 · 44rD VS162,778 · 43rD VVS160,081 · 46rE VVS227,496 · 42rE VS120,353 · 40rD IF15,212 · 40rE VVS114,837 · 41rD FL12,090 · 32rD VS211,091 · 41rE VS24,293 · 36rF VVS23,357 · 38rE IF2,287 · 41rF VS12,143 · 36rF VVS11,428 · 40rF VS2538 · 30rG VVS2461 · 33rE FL362 · 31rI VS2350 · 26rF IF333 · 36rH VVS2292 · 27rG VVS1284 · 28rI VS1264 · 23rG VS1205 · 29rG VS2135 · 23rH VS1134 · 26rI VVS2117 · 24rG IF110 · 26rH VS281 · 21rI VVS180 · 22rF FL61 · 21rH IF59 · 25rH VVS144 · 21r

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

  • Round: the most common cut, with the highest light return per carat.
  • 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 29,776 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 437%, about £533.

Can I see retailers for one exact grade?

Yes. Each of the 32 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.