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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, 63 of them, across 194,254 current listings.

Updated October 29, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

194,254

Retailers carrying

63

Median confirmed price

£587

Grade combinations

32

Certificate mix:IGI 171,976 · GIA 16,736 · GCAL 622 · HRD 10

What it actually costs

Half of these diamonds are listed between £385 and £1,182 (as of October 29, 2026).

Lower 10% £337Median £587Upper 10% £2,679

Middle half listed between £385 to £1,182

Certificated stones with a recently confirmed price only, 19,046 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

284%

Typical difference

£1,531

Stones compared

15,490

Across 15,490 stones of this size and shape carried by more than one retailer, the dearest listing sits 284% above the cheapest for the identical certificated diamond, a typical gap of £1,531. 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 Carat12,400 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
  4. 4NZ Jewellers9,342 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
  7. 7Aurelinne8,417 in stock
    United States·Founded 2021·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Aurelinne
  8. 8

    The Perfect Carat

    8,275 in stock
    US
    Terms not yet verified
Show 15 more retailers
  2. 12Adiamor6,614 in stock
    United States·Founded 1999·30-day returns
    Terms not yet verified
    Visit Adiamor
  3. 13Brilliance6,496 in stock
    United States·Founded 2002·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Brilliance
  4. 14B2C Jewels6,392 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
  7. 17RockHer5,031 in stock
    United States·Founded 2016·40-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit RockHer
  10. 20Cape Diamonds4,593 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
  11. 21Yorxs4,006 in stock
    Germany·Founded 2011·100-day returns
    Terms not yet verified
    Visit Yorxs

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 VS126,683 · 58rD VS124,324 · 55rE VVS221,775 · 55rD VVS220,881 · 55rF VS115,742 · 53rD VVS113,129 · 53rF VVS212,918 · 54rD IF10,712 · 46rE VS27,946 · 45rG VS16,928 · 47rD FL5,937 · 40rG VVS24,672 · 48rE VVS14,467 · 51rD VS24,059 · 47rF VS24,023 · 49rH VS11,645 · 38rG VS21,627 · 41rE IF1,569 · 46rF VVS11,554 · 46rH VVS21,073 · 36rH VS2738 · 30rE FL627 · 39rG VVS1362 · 36rF IF260 · 32rI VS1140 · 23rF FL115 · 27rH VVS198 · 24rG IF88 · 33rI VS272 · 23rG FL38 · 20rI VVS227 · 12rH IF23 · 22r

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

  • Emerald: a rectangular step cut with a hall-of-mirrors look that requires high clarity.
  • 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 15,490 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 284%, about £1,531.

Can I see retailers for one exact grade?

Yes. Each of the 32 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.

Where to Buy 3ct Lab Grown Emerald Diamonds | Carat Hunter