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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, 60 of them, across 27,300 live listings.

Updated September 21, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

27,300

Retailers carrying

60

Median active price

£466

Grade combinations

25

Certificate mix:IGI 25,925 · GCAL 334 · GIA 323 · HRD 2

What it actually costs

Lower 10% £220Median £466Upper 10% £1,259

Middle half sell between £299 to £842

Certificated stones with a live price only, 5,787 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

207%

Typical difference

£619

Stones compared

3,069

Across 3,069 stones of this size and shape carried by more than one retailer, the dearest listing sits 207% above the cheapest for the identical certificated diamond, a typical gap of £619. 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
  12. 22

    GemTrove

    320 in stock
    AU

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.

E VVS24,208 · 44rD VVS23,491 · 55rD VVS13,113 · 43rE VS12,734 · 42rD FL2,694 · 27rD IF2,439 · 35rD VS12,002 · 43rF VVS21,564 · 41rE VVS11,319 · 42rF VS11,101 · 39rE VS2676 · 33rD VS2344 · 34rF VS2291 · 29rF VVS1258 · 35rG VS1242 · 25rE IF185 · 29rG VVS2176 · 21rE FL131 · 24rG VS265 · 21rG VVS161 · 16rH VS157 · 14rH VVS245 · 15rH VS233 · 6rF IF30 · 17rH VVS127 · 3r

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

  • Marquise: a pointed-end ellipse that faces up large for its carat.
  • 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 3,069 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 207%, about £619.

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?

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 Marquise Diamonds | Carat Hunter