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Carat Hunter · Where to buy diamonds

Where to buy a 1ct lab-grown marquise diamond

Every retailer in our index stocking this size and shape, 65 of them, across 141,609 live listings.

Updated September 19, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

141,609

Retailers carrying

65

Median active price

£284

Grade combinations

29

Certificate mix:IGI 137,801 · GCAL 651 · GIA 485 · HRD 22

What it actually costs

Lower 10% £158Median £284Upper 10% £720

Middle half sell between £219 to £493

Certificated stones with a live price only, 29,400 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

197%

Typical difference

£447

Stones compared

17,773

Across 17,773 stones of this size and shape carried by more than one retailer, the dearest listing sits 197% above the cheapest for the identical certificated diamond, a typical gap of £447. 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 VVS224,709 · 57rE VVS222,719 · 48rE VS117,193 · 48rD VVS114,993 · 47rD VS112,091 · 47rD FL8,910 · 28rE VVS17,994 · 47rD IF7,349 · 40rF VVS26,006 · 43rE VS25,138 · 40rF VS13,224 · 48rD VS22,517 · 38rE IF1,533 · 37rG VVS21,504 · 33rG VS11,480 · 35rF VVS11,394 · 37rF VS2676 · 33rH VS1477 · 27rG VS2431 · 26rE FL292 · 26rH VVS2264 · 24rG VVS1175 · 25rH VS2131 · 19rF IF118 · 31rI VS1110 · 14rI VS274 · 15rI VVS243 · 18rH VVS131 · 9rF FL14 · 10r

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 17,773 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 197%, about £447.

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 1ct Lab Grown Marquise Diamonds | Carat Hunter