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Carat Hunter · Where to buy diamonds

3ct · I · VS1 · 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

345

Retailers carrying

28

Price range

$438 to
$6,972

Median confirmed price

$1,489

Certificate mix:IGI 301 · GIA 19 · GCAL 15

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 Carat32 in stock
    United States·Founded 2016·GCAL, GIA, IGI·30-day returns·Ships to United States
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  4. 4Cape Diamonds24 in stock
    South Africa·Founded 2005·IGI·7-day returns·Ships to United States
    Terms read on the retailer’s own site, June 15, 2026
    Visit Cape Diamonds
  5. 5Adiamor24 in stock
    United States·Founded 1999·GCAL, IGI·30-day returns·Ships to United States
    Terms not yet verified
    Visit Adiamor
  6. 6B2C Jewels23 in stock
    United States·Founded 2004·IGI·30-day returns·Ships to United States
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  8. 8RockHer19 in stock
    United States·Founded 2016·IGI·40-day returns·Ships to United States
    Terms not yet verified
    Visit RockHer
Show 15 more retailers
  1. 11Moon Ocean15 in stock
    United Kingdom·Founded 2022·IGI·30-day returns·Ships to United States
    Terms not yet verified
    Visit Moon Ocean
  3. 13Yorxs13 in stock
    Germany·Founded 2011·GIA, IGI·100-day returns
    Terms not yet verified
    Visit Yorxs
  7. 17Allurez6 in stock
    United States·Founded 2010·30-day returns·Ships to United States
    Terms not yet verified
    Visit Allurez
  13. 23Zales2 in stock
    United States·Founded 1924·GIA·30-day returns·Ships to United States
    Terms not yet verified
    Visit Zales
  15. 25Jared2 in stock
    United States·Founded 1993·GIA·30-day returns·Ships to United States
    Terms not yet verified
    Visit Jared

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 345 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 cushion diamond, all grades

How pricing is spread at this spec

For the 88 diamonds at this spec with a recently confirmed price, each taken at its cheapest confirmed price, the distribution looks like this:

  • Lowest confirmed
    $438
  • 10th percentile
    $731
  • Median
    $1,489
  • 75th percentile
    $3,326
  • 90th percentile
    $4,450
  • Highest confirmed
    $6,972

The 15.9x 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 $731. Use the explorer to sort by price.

Sort by price

Best cut quality for the spec?

194 of 345 active listings carry Excellent or Ideal across cut, polish and symmetry.

View top-cut subset

GIA-graded only?

19 of 345 (6%) carry GIA. 7 retailers stock GIA at this spec.

Want None or Faint fluorescence?

342 of 345 are graded None or Faint at this spec.

Shopping from United States?

22 of the 25 retailers ship to United States. 3 do not.

What this spec means

  • Cushion: a softened-corner square or rectangle with a vintage feel.
  • I color: near-colorless, with a faint warm tint just detectable in larger stones.
  • VS1 clarity: very slight inclusions, eye-clean to virtually everyone.
  • 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 I VS1 cushion lab grown diamonds.

Compare Rare Carat vs Loose Grown Diamond

Related specs

Slightly smaller carat

cushion-2ct-i-vs1-lab

One colour grade higher

cushion-3ct-h-vs1-lab

One clarity grade higher

cushion-3ct-i-vvs2-lab

One clarity grade lower

cushion-3ct-i-vs2-lab

Same spec, natural

cushion-3ct-i-vs1-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 I VS1 Cushion Lab Grown Diamonds | Carat Hunter