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Carat Hunter · Where to buy diamonds

Where to buy a 1ct lab-grown radiant diamond

Every retailer in our index stocking this size and shape, 61 of them, across 84,004 live listings.

Updated September 15, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

84,004

Retailers carrying

61

Median active price

£298

Grade combinations

32

Certificate mix:IGI 79,429 · GIA 2,213 · GCAL 888 · HRD 1

What it actually costs

Lower 10% £135Median £298Upper 10% £833

Middle half sell between £224 to £534

Certificated stones with a live price only, 23,435 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

151%

Typical difference

£399

Stones compared

13,143

Across 13,143 stones of this size and shape carried by more than one retailer, the dearest listing sits 151% above the cheapest for the identical certificated diamond, a typical gap of £399. 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.

Show 15 more retailers

Stock counts are updated daily. Founded, return window and shipping details are retailer-provided and were last verified September 2, 2026.

Narrow it down by grade

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

D VVS217,078 · 55rD VS110,684 · 45rD VVS19,948 · 44rE VS18,235 · 42rE VVS28,174 · 43rE VVS13,948 · 42rD IF3,544 · 37rF VS13,440 · 41rD VS22,361 · 37rF VVS22,361 · 43rE VS22,278 · 33rG VS12,180 · 35rG VVS21,907 · 34rD FL1,881 · 27rE IF1,423 · 37rF VS21,271 · 34rF VVS1681 · 36rG VS2539 · 35rH VS1455 · 30rH VVS2329 · 33rE FL256 · 19rF IF244 · 31rH VS2192 · 26rG VVS1172 · 26rI VS1114 · 23rH VVS197 · 33rG IF50 · 22rI VS249 · 9rI VVS246 · 17rF FL34 · 15rH IF18 · 16rI VVS113 · 7r

Stones at this spec now

Live 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 60% to 80% less than a comparable natural cohort.

Frequently asked

How much do retailers differ on the same diamond?

Across 13,143 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 151%, about £399.

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?

Live listings refresh daily. 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.