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Carat Hunter · Where to buy diamonds

Where to buy a 3ct lab-grown asscher diamond

Every retailer in our index stocking this size and shape, 56 of them, across 39,569 current listings.

Updated October 28, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

39,569

Retailers carrying

56

Median confirmed price

£706

Grade combinations

28

Certificate mix:IGI 33,443 · GIA 4,651 · GCAL 48 · HRD 21

What it actually costs

Half of these diamonds are listed between £422 and £1,099 (as of October 28, 2026).

Lower 10% £374Median £706Upper 10% £1,582

Middle half listed between £422 to £1,099

Certificated stones with a recently confirmed price only, 6,892 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

292%

Typical difference

£1,851

Stones compared

3,917

Across 3,917 stones of this size and shape carried by more than one retailer, the dearest listing sits 292% above the cheapest for the identical certificated diamond, a typical gap of £1,851. 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.

  2. 2Rare Carat3,222 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
  9. 9Adiamor1,253 in stock
    United States·Founded 1999·30-day returns
    Terms not yet verified
    Visit Adiamor
Show 15 more retailers
  1. 11B2C Jewels1,197 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
  2. 12Brilliance1,190 in stock
    United States·Founded 2002·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Brilliance
  3. 13NZ Jewellers1,180 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
  4. 14

    The Perfect Carat

    1,091 in stock
    US
    Terms not yet verified
  5. 15Moon Ocean1,019 in stock
    United Kingdom·Founded 2022·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Moon Ocean
  6. 16Aurelinne1,013 in stock
    United States·Founded 2021·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Aurelinne
  7. 17RockHer937 in stock
    United States·Founded 2016·40-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit RockHer
  9. 19Yorxs741 in stock
    Germany·Founded 2011·100-day returns
    Terms not yet verified
    Visit Yorxs
  10. 20Cape Diamonds722 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

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.

16 of the 25 retailers ship to United Kingdom. 9 do not.

Narrow it down by grade

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

E VVS26,196 · 51rE VS14,457 · 48rD VVS24,096 · 48rF VVS23,647 · 48rF VS13,259 · 48rD VVS13,223 · 46rD VS13,078 · 49rD IF1,971 · 41rG VS11,402 · 43rD FL1,289 · 35rE VVS11,242 · 44rE VS21,183 · 40rG VVS21,131 · 42rF VS2823 · 37rD VS2618 · 38rH VS1424 · 38rH VVS2309 · 35rG VS2306 · 36rF VVS1238 · 37rH VS2200 · 29rE FL102 · 26rE IF101 · 31rG VVS178 · 25rF IF62 · 28rG IF37 · 27rH VVS130 · 5rI VVS128 · 15rI VS124 · 15r

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

  • Asscher: a square step cut with cropped corners.
  • 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 3,917 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 292%, about £1,851.

Can I see retailers for one exact grade?

Yes. Each of the 28 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.