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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 41,645 current listings.

Updated October 31, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

41,645

Retailers carrying

56

Median confirmed price

£641

Grade combinations

28

Certificate mix:IGI 35,387 · GIA 4,642 · GCAL 48 · HRD 21

What it actually costs

Half of these diamonds are listed between £399 and £1,076 (as of October 31, 2026).

Lower 10% £361Median £641Upper 10% £1,547

Middle half listed between £399 to £1,076

Certificated stones with a recently confirmed price only, 7,045 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

358%

Typical difference

£1,718

Stones compared

4,709

Across 4,709 stones of this size and shape carried by more than one retailer, the dearest listing sits 358% above the cheapest for the identical certificated diamond, a typical gap of £1,718. 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 Carat3,924 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. 9B2C Jewels1,309 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
  10. 10Adiamor1,308 in stock
    United States·Founded 1999·30-day returns
    Terms not yet verified
    Visit Adiamor
Show 15 more retailers
  1. 11NZ Jewellers1,287 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
  2. 12

    The Perfect Carat

    1,247 in stock
    US
    Terms not yet verified
  3. 13Brilliance1,212 in stock
    United States·Founded 2002·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Brilliance
  4. 14Aurelinne1,109 in stock
    United States·Founded 2021·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Aurelinne
  7. 17RockHer1,019 in stock
    United States·Founded 2016·40-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit RockHer
  8. 18Moon Ocean1,003 in stock
    United Kingdom·Founded 2022·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Moon Ocean
  11. 21Cape Diamonds754 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
  12. 22Yorxs736 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.

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 VVS26,574 · 51rE VS14,783 · 48rD VVS24,227 · 48rF VVS23,999 · 48rF VS13,413 · 48rD VVS13,245 · 46rD VS13,213 · 49rD IF1,974 · 41rG VS11,496 · 43rD FL1,312 · 35rE VVS11,308 · 44rE VS21,252 · 41rG VVS21,213 · 42rF VS2904 · 37rD VS2633 · 37rH VS1437 · 38rH VVS2352 · 35rG VS2332 · 36rF VVS1250 · 37rH VS2208 · 30rE FL124 · 26rE IF101 · 31rG VVS190 · 25rF IF62 · 28rG IF37 · 27rH VVS134 · 5rI VVS132 · 17rI VS125 · 16r

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 4,709 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 358%, about £1,718.

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.