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Carat Hunter · Where to buy diamonds

Where to buy a 0.5ct lab-grown cushion diamond

Every retailer in our index stocking this size and shape, 42 of them, across 14,855 current listings.

Updated October 31, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

14,855

Retailers carrying

42

Median confirmed price

£187

Grade combinations

22

Certificate mix:IGI 14,298 · GIA 4 · GCAL 1

What it actually costs

Half of these diamonds are listed between £122 and £294 (as of October 31, 2026).

Lower 10% £104Median £187Upper 10% £380

Middle half listed between £122 to £294

Certificated stones with a recently confirmed price only, 1,864 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

357%

Typical difference

£560

Stones compared

1,460

Across 1,460 stones of this size and shape carried by more than one retailer, the dearest listing sits 357% above the cheapest for the identical certificated diamond, a typical gap of £560. 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. 5Rare Carat861 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
  6. 6Yorxs849 in stock
    Germany·Founded 2011·100-day returns
    Terms not yet verified
    Visit Yorxs
  7. 7B2C Jewels823 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
  10. 10Cape Diamonds499 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
Show 15 more retailers
  6. 16Allurez363 in stock
    United States·Founded 2010·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Allurez
  11. 21GemsNY256 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 VVS24,702 · 39rD VS12,579 · 37rD VVS12,137 · 38rE VVS21,336 · 35rE VS11,166 · 34rD VS2712 · 31rE VVS1681 · 39rF VVS2319 · 32rD IF296 · 33rE VS2277 · 25rE IF152 · 32rF VS1142 · 23rG VVS276 · 25rF VS259 · 22rF VVS146 · 28rG VS136 · 21rF IF25 · 22rG VS222 · 14rG VVS122 · 15rI VS121 · 14rH VS220 · 16rD FL13 · 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

  • Cushion: a softened-corner square or rectangle with a vintage feel.
  • 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 1,460 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 357%, about £560.

Can I see retailers for one exact grade?

Yes. Each of the 22 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 0.5ct Lab Grown Cushion Diamonds | Carat Hunter