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Carat Hunter · Where to buy diamonds

Where to buy a 3ct lab-grown emerald diamond

Every retailer in our index stocking this size and shape, 61 of them, across 124,110 live listings.

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

The market at this size and shape

Active listings

124,110

Retailers carrying

61

Median active price

£777

Grade combinations

31

Certificate mix:IGI 113,761 · GIA 7,807 · GCAL 309 · HRD 10

What it actually costs

Lower 10% £384Median £777Upper 10% £3,091

Middle half sell between £553 to £1,456

Certificated stones with a live price only, 26,694 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

270%

Typical difference

£1,795

Stones compared

16,171

Across 16,171 stones of this size and shape carried by more than one retailer, the dearest listing sits 270% above the cheapest for the identical certificated diamond, a typical gap of £1,795. 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.

E VS115,252 · 52rF VS113,250 · 46rD VS112,541 · 47rD VVS211,118 · 55rF VVS210,162 · 48rE VVS28,751 · 50rG VS18,508 · 40rD VVS16,892 · 44rD IF6,544 · 38rG VVS25,483 · 39rE VS24,944 · 39rD FL3,463 · 30rD VS22,752 · 42rE VVS12,386 · 45rF VS22,281 · 38rH VVS22,266 · 28rG VS21,806 · 35rH VS11,662 · 31rE IF1,002 · 39rF VVS1946 · 42rH VS2908 · 26rE FL353 · 28rG VVS1259 · 30rF IF155 · 23rI VS1108 · 21rH VVS192 · 18rG IF69 · 24rI VS254 · 18rF FL44 · 20rI VVS223 · 7rG FL21 · 12r

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

  • Emerald: a rectangular step cut with a hall-of-mirrors look that requires high clarity.
  • 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 16,171 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 270%, about £1,795.

Can I see retailers for one exact grade?

Yes. Each of the 31 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.