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Carat Hunter · Where to buy diamonds

1ct · E · IF · Cushion · Lab-grown

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

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

Market at this spec

Active listings

1,098

Retailers carrying

42

Price range

£176 to
£1,938

Median confirmed price

£396

Certificate mix:IGI 1,066 · GCAL 12 · GIA 4

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. 1Rare Carat70 in stock
    United States·Founded 2016·GCAL, IGI·30-day returns·Ships to Ireland
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  5. 5Adiamor63 in stock
    United States·Founded 1999·IGI·30-day returns
    Terms not yet verified
    Visit Adiamor
  8. 8B2C Jewels59 in stock
    United States·Founded 2004·IGI·30-day returns·Ships to Ireland
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  9. 9Cape Diamonds50 in stock
    South Africa·Founded 2005·IGI·7-day returns·Ships to Ireland
    Terms read on the retailer’s own site, June 15, 2026
    Visit Cape Diamonds
Show 15 more retailers
  1. 11Yorxs45 in stock
    Germany·Founded 2011·IGI·100-day returns
    Terms not yet verified
    Visit Yorxs
  8. 18RockHer27 in stock
    United States·Founded 2016·IGI·40-day returns·Ships to Ireland
    Terms not yet verified
    Visit RockHer

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 1,098 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 1ct lab grown cushion diamond, all grades

How pricing is spread at this spec

For the 185 diamonds at this spec with a recently confirmed price, each taken at its cheapest confirmed price, the distribution looks like this:

  • Lowest confirmed
    £176
  • 10th percentile
    £219
  • Median
    £396
  • 75th percentile
    £638
  • 90th percentile
    £1,023
  • Highest confirmed
    £1,938

The 11.0x 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 £219. Use the explorer to sort by price.

Sort by price

Best cut quality for the spec?

693 of 1,098 active listings carry Excellent or Ideal across cut, polish and symmetry.

View top-cut subset

Want None or Faint fluorescence?

1,079 of 1,098 are graded None or Faint at this spec.

Shopping from Ireland?

14 of the 25 retailers ship to Ireland. 11 do not.

What this spec means

  • Cushion: a softened-corner square or rectangle with a vintage feel.
  • E colour: colourless, indistinguishable from D to most viewers.
  • 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 1ct E IF cushion lab grown diamonds.

Compare Rare Carat vs Taylor and Hart

Related specs

Slightly smaller carat

cushion-0-75ct-e-if-lab

Slightly larger carat

cushion-1-25ct-e-if-lab

One colour grade higher

cushion-1ct-d-if-lab

One colour grade lower

cushion-1ct-f-if-lab

One clarity grade higher

cushion-1ct-e-fl-lab

One clarity grade lower

cushion-1ct-e-vvs1-lab

Same spec, natural

cushion-1ct-e-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.