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Carat Hunter · Where to buy diamonds

3ct · D · IF · Round · Lab-grown

Every retailer carrying this exact spec, from our latest listings.

Updated October 30, 2026 · Independent. Zero affiliate revenue.

Market at this spec

Active listings

11,475

Retailers carrying

51

Price range

£553 to
£8,219

Median confirmed price

£1,470

Certificate mix:IGI 9,659 · GIA 1,362 · GCAL 307

Range and median take each diamond at this spec at its cheapest recently confirmed price. They are cohort statistics, not per-retailer pricing claims.

Every retailer that stocks this spec

Ranked by active inventory count. Selection is mechanical, not editorial.

  1. 1Carbon Sparkle561 in stock
    United States·GCAL, GIA, IGI·21-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, September 2, 2026
    Visit Carbon Sparkle
  2. 2NZ Jewellers545 in stock
    New Zealand·Founded 2006·GCAL, GIA, IGI·30-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
  3. 3

    The Perfect Carat

    500 in stock
    US·GCAL, GIA, IGI
    Terms not yet verified
  4. 4Rare Carat493 in stock
    United States·Founded 2016·GCAL, GIA, IGI·30-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  8. 8Moon Ocean463 in stock
    United Kingdom·Founded 2022·GIA, IGI·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Moon Ocean
  9. 9Aurelinne456 in stock
    United States·Founded 2021·GCAL, GIA, IGI·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Aurelinne
  10. 10B2C Jewels429 in stock
    United States·Founded 2004·GCAL, GIA, IGI·30-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
Show 15 more retailers
  2. 12Adiamor410 in stock
    United States·Founded 1999·GCAL, GIA, IGI·30-day returns
    Terms not yet verified
    Visit Adiamor
  4. 14Yorxs385 in stock
    Germany·Founded 2011·GIA, IGI·100-day returns
    Terms not yet verified
    Visit Yorxs
  5. 15RockHer349 in stock
    United States·Founded 2016·GIA, IGI·40-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit RockHer
  8. 18Brilliance314 in stock
    United States·Founded 2002·GIA, IGI·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit Brilliance
  9. 1977 Diamonds301 in stock
    United Kingdom·Founded 2005·GCAL, GIA, IGI·30-day returns·Ships to United Kingdom
    Terms not yet verified
    Visit 77 Diamonds
  10. 20

    GemTrove

    293 in stock
    AU·GCAL, IGI
    Terms not yet verified
  12. 22Cape Diamonds260 in stock
    South Africa·Founded 2005·GIA, IGI·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.

Explore all 11,475 stones in this cohort

Stones at this spec now

Current examples carried by more than one retailer, so the comparison is real. Prices shown in USD.

See every 3ct lab grown round diamond, all grades

How pricing is spread at this spec

For the 1,400 diamonds at this spec with a recently confirmed price, each taken at its cheapest confirmed price, the distribution looks like this:

  • Lowest confirmed
    £553
  • 10th percentile
    £668
  • Median
    £1,470
  • 75th percentile
    £2,673
  • 90th percentile
    £4,111
  • Highest confirmed
    £8,219

The 14.9x spread from the lowest to the highest confirmed price is normal for cohorts at this spec. Differences reflect cert lab, cut quality, brand premium and inclusions visibility.

Cohort distribution only. No retailer named adjacent to a dollar figure in this section.

How to pick

Lowest price floor for the spec?

The cheapest confirmed prices start around £668. Use the explorer to sort by price.

Sort by price

Best cut quality for the spec?

11,274 of 11,475 active listings carry Excellent or Ideal across cut, polish and symmetry.

View top-cut subset

GIA-graded only?

1,362 of 11,475 (12%) carry GIA. 24 retailers stock GIA at this spec.

Want None or Faint fluorescence?

11,308 of 11,475 are graded None or Faint at this spec.

Shopping from United Kingdom?

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

What this spec means

  • Round: the most common cut, with the highest light return per carat.
  • D colour: absolutely colourless, the top grade.
  • IF clarity: internally flawless, with no internal imperfections and surface marks only.
  • Lab-grown: chemically identical to natural diamonds, typically at least 90% less than a comparable natural cohort from 1 carat up.

Compare the top retailers carrying this spec

Side-by-side facts for the two stores carrying the most 3ct D IF round lab grown diamonds.

Compare Carbon Sparkle vs NZ Jewellers

Related specs

Slightly smaller carat

round-2ct-d-if-lab

One colour grade lower

round-3ct-e-if-lab

One clarity grade higher

round-3ct-d-fl-lab

One clarity grade lower

round-3ct-d-vvs1-lab

Same spec, natural

round-3ct-d-if-natural

Frequently asked

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.

Why is one retailer cheaper for the same certificate?

Markup and overhead vary by retailer. The same physical diamond can list at very different prices across stores. See our cross-retailer analysis for the structural reasons.

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 D IF Round Lab Grown Diamonds | Carat Hunter