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Carat Hunter · Where to buy diamonds

Where to buy a 1.25ct lab-grown radiant diamond

Every retailer in our index stocking this size and shape, 59 of them, across 19,137 live listings.

Updated September 20, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

19,137

Retailers carrying

59

Median active price

£373

Grade combinations

27

Certificate mix:IGI 17,301 · GIA 1,013 · GCAL 266

What it actually costs

Lower 10% £197Median £373Upper 10% £1,203

Middle half sell between £256 to £798

Certificated stones with a live price only, 5,349 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

178%

Typical difference

£545

Stones compared

2,860

Across 2,860 stones of this size and shape carried by more than one retailer, the dearest listing sits 178% above the cheapest for the identical certificated diamond, a typical gap of £545. 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 VVS22,984 · 47rD VS12,458 · 39rD VVS12,223 · 40rE VS11,738 · 41rE VVS21,682 · 45rF VS11,214 · 41rG VS11,114 · 38rF VVS2825 · 38rE VVS1774 · 42rD IF771 · 32rE VS2450 · 31rD FL444 · 26rG VVS2411 · 32rD VS2367 · 33rF VS2349 · 30rG VS2338 · 31rE IF311 · 31rH VS1161 · 31rF VVS1130 · 21rH VVS2126 · 24rI VS163 · 17rF IF44 · 23rG VVS135 · 15rH VS232 · 13rI VVS225 · 16rE FL22 · 15rI VS216 · 11r

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 2,860 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 178%, about £545.

Can I see retailers for one exact grade?

Yes. Each of the 27 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 1.25ct Lab Grown Radiant Diamonds | Carat Hunter