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Carat Hunter · Where to buy diamonds

3ct · D · IF · Cushion · Lab-grown

Live snapshot of every retailer carrying this exact spec today.

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

Market at this spec

Active listings

4,114

Retailers carrying

32

Price range

£912 to
£44,724

Median active price

£3,265

Certificate mix:IGI 3,833 · GIA 184 · GCAL 71

Range and median are cohort statistics across every active listing at this spec. They are not per-retailer pricing claims.

Every retailer that stocks this spec

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

Show 15 more retailers
  9. 19

    William & Sons Jewelers

    60 in stock
    USA·GCAL, GIA, IGI
  13. 23Blue Nile18 in stock
    United States·Founded 1999·GCAL, GIA, IGI·30-day returns·Ships to United Kingdom
    Visit Blue Nile

Stock counts are updated daily. Founded, return window and shipping details are retailer-provided and were last verified June 15, 2026.

Explore all 4,114 stones in this cohort

How pricing is spread at this spec

For all 4,114 active listings at this spec, the price distribution looks like this:

  • Lowest active
    £912
  • 10th percentile
    £1,822
  • Median
    £3,265
  • 75th percentile
    £6,564
  • 90th percentile
    £9,409
  • Highest active
    £44,724

The 49.1x spread from lowest to highest active 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 active listings start around £1,822. Use the explorer to sort by price.

Sort by price

Best cut quality for the spec?

2,683 of 4,114 active listings carry Excellent or Ideal across cut, polish and symmetry.

View top-cut subset

GIA-graded only?

184 of 4,114 (4%) carry GIA. 20 retailers stock GIA at this spec.

Want None or Faint fluorescence?

4,088 of 4,114 are graded None or Faint at this spec.

Shopping from United Kingdom?

6 of the 25 retailers ship to United Kingdom. 19 do not.

What this spec means

  • Cushion: a softened-corner square or rectangle, vintage feel.
  • D colour: absolutely colourless, the top grade.
  • IF clarity: internally flawless, no internal imperfections, surface marks only.
  • Lab-grown: chemically identical to natural diamonds, typically 60% to 80% less than a comparable natural cohort.

Compare the top retailers carrying this spec

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

Compare Moon Ocean vs Loose Grown Diamond

Related specs

Slightly smaller carat

cushion-2ct-d-if-lab

One colour grade lower

cushion-3ct-e-if-lab

One clarity grade higher

cushion-3ct-d-fl-lab

One clarity grade lower

cushion-3ct-d-vvs1-lab

Same spec, natural

cushion-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?

Live listings refresh daily. 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 Cushion Lab Grown Diamonds | Carat Hunter