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Carat Hunter · Where to buy diamonds

Where to buy a 1.25ct lab-grown princess diamond

Every retailer in our index stocking this size and shape, 57 of them, across 17,362 live listings.

Updated September 14, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

17,362

Retailers carrying

57

Median active price

£352

Grade combinations

28

Certificate mix:IGI 15,843 · GIA 749 · GCAL 155 · AGS 6 · HRD 2

What it actually costs

Lower 10% £151Median £352Upper 10% £1,385

Middle half sell between £269 to £890

Certificated stones with a live price only, 3,318 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

201%

Typical difference

£722

Stones compared

2,001

Across 2,001 stones of this size and shape carried by more than one retailer, the dearest listing sits 201% above the cheapest for the identical certificated diamond, a typical gap of £722. 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 June 15, 2026.

7 of the 25 retailers ship to United Kingdom. 18 do not.

Narrow it down by grade

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

D VVS23,837 · 53rE VVS22,426 · 41rD VS12,246 · 40rE VS11,852 · 41rD VVS11,728 · 39rE VVS11,185 · 40rF VS1653 · 36rF VVS2647 · 39rE VS2345 · 31rG VS1334 · 31rD IF293 · 35rD VS2276 · 34rD FL234 · 23rF VS2198 · 28rG VVS2171 · 25rF VVS1170 · 32rH VS1146 · 21rE IF121 · 25rH VVS2112 · 22rG VS2101 · 20rF IF64 · 29rG VVS141 · 16rH VS239 · 11rI VS125 · 16rE FL19 · 15rG IF15 · 14rG FL13 · 13rI VVS211 · 4r

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

  • Princess: a square brilliant cut, second only to round in popularity.
  • 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 2,001 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 201%, about £722.

Can I see retailers for one exact grade?

Yes. Each of the 28 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.