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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, 60 of them, across 78,955 live listings.

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

The market at this size and shape

Active listings

78,955

Retailers carrying

60

Median active price

£370

Grade combinations

29

Certificate mix:IGI 72,316 · GIA 4,523 · GCAL 661 · HRD 2

What it actually costs

Lower 10% £156Median £370Upper 10% £1,461

Middle half sell between £280 to £975

Certificated stones with a live price only, 20,105 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

215%

Typical difference

£669

Stones compared

11,231

Across 11,231 stones of this size and shape carried by more than one retailer, the dearest listing sits 215% above the cheapest for the identical certificated diamond, a typical gap of £669. 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.

6 of the 25 retailers ship to United Kingdom. 19 do not.

Narrow it down by grade

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

D VVS212,825 · 53rE VVS210,121 · 49rD VS19,745 · 51rD VVS19,250 · 47rE VS17,495 · 48rE VVS14,102 · 43rD IF3,582 · 39rF VVS23,570 · 45rF VS13,463 · 42rG VS12,383 · 36rE VS21,812 · 35rD FL1,663 · 28rD VS21,530 · 37rG VVS21,304 · 38rE IF972 · 37rF VVS1956 · 38rF VS2883 · 35rG VS2873 · 32rH VS1774 · 32rH VVS2448 · 32rH VS2238 · 29rE FL237 · 25rF IF182 · 29rG VVS1134 · 28rI VS197 · 21rG IF94 · 21rI VVS293 · 19rI VS267 · 18rH IF33 · 21r

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 11,231 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 215%, about £669.

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?

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.

Where to Buy 1.5ct Lab Grown Radiant Diamonds | Carat Hunter