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Carat Hunter · Where to buy diamonds

Where to buy a 1.25ct lab-grown marquise diamond

Every retailer in our index stocking this size and shape, 59 of them, across 36,955 current listings.

Updated November 4, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

36,955

Retailers carrying

59

Median confirmed price

£361

Grade combinations

25

Certificate mix:IGI 34,869 · GIA 527 · GCAL 460 · HRD 1

What it actually costs

Half of these diamonds are listed between £219 and £601 (as of November 4, 2026).

Lower 10% £169Median £361Upper 10% £940

Middle half listed between £219 to £601

Certificated stones with a recently confirmed price only, 3,132 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

300%

Typical difference

£793

Stones compared

2,243

Across 2,243 stones of this size and shape carried by more than one retailer, the dearest listing sits 300% above the cheapest for the identical certificated diamond, a typical gap of £793. 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.

  1. 1Rare Carat2,840 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
  7. 7Adiamor1,516 in stock
    United States·Founded 1999·30-day returns
    Terms not yet verified
    Visit Adiamor
  9. 9B2C Jewels1,477 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. 10NZ Jewellers1,467 in stock
    New Zealand·Founded 2006·30-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
Show 15 more retailers
  1. 11

    The Perfect Carat

    1,293 in stock
    US
    Terms not yet verified
  3. 13Aurelinne1,235 in stock
    United States·Founded 2021·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Aurelinne
  6. 16Cape Diamonds1,027 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
  7. 17Yorxs1,002 in stock
    Germany·Founded 2011·100-day returns
    Terms not yet verified
    Visit Yorxs
  9. 19Moon Ocean763 in stock
    United Kingdom·Founded 2022·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Moon Ocean

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.

15 of the 25 retailers ship to United Kingdom. 10 do not.

Narrow it down by grade

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

E VVS25,144 · 55rD VVS25,024 · 55rD VVS14,784 · 52rD IF4,171 · 47rD FL3,661 · 39rE VS13,221 · 52rD VS12,956 · 54rE VVS11,833 · 52rF VVS21,790 · 52rF VS11,026 · 49rE VS2726 · 41rF VVS1422 · 43rD VS2406 · 42rG VS1362 · 33rE IF331 · 38rF VS2319 · 34rG VVS2222 · 33rE FL211 · 33rG VVS170 · 23rG VS266 · 23rH VS165 · 11rF IF40 · 25rH VS237 · 8rH VVS233 · 6rH VVS127 · 3r

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

  • Marquise: a pointed-end ellipse that faces up large for its carat.
  • 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 2,243 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 300%, about £793.

Can I see retailers for one exact grade?

Yes. Each of the 25 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.