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Carat Hunter · Where to buy diamonds

1.5ct · E · SI1 · Princess · Lab-grown

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

Updated November 6, 2026 · Independent. Zero affiliate revenue.

Market at this spec

Active listings

419

Retailers carrying

35

Price range

$190 to
$1,756

Median confirmed price

$615

Certificate mix:IGI 338 · GIA 29

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.

  3. 3

    The Perfect Carat

    34 in stock
    US·GIA, IGI·Ships to United States
    Terms not yet verified
  4. 4NZ Jewellers30 in stock
    New Zealand·Founded 2006·GIA, IGI·30-day returns·Ships to United States
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
  7. 7B2C Jewels24 in stock
    United States·Founded 2004·GIA, IGI·30-day returns·Ships to United States
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  8. 8Rare Carat22 in stock
    United States·Founded 2016·IGI·30-day returns·Ships to United States
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
Show 25 more retailers
  1. 11Adiamor17 in stock
    United States·Founded 1999·GIA, IGI·Ships to United States
    Terms not yet verified
    Visit Adiamor
  11. 21Allurez4 in stock
    United States·Founded 2010·Ships to United States
    Terms not yet verified
    Visit Allurez
  15. 25RockHer4 in stock
    United States·Founded 2016·GIA, IGI·Ships to United States
    Terms not yet verified
    Visit RockHer
  18. 28Jared2 in stock
    United States·Founded 1993·GIA·Ships to United States
    Terms not yet verified
    Visit Jared
  21. 31Zales2 in stock
    United States·Founded 1924·GIA·Ships to United States
    Terms not yet verified
    Visit Zales

Stock counts reflect current listings. 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 419 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 1.5ct lab grown princess diamond, all grades

How pricing is spread at this spec

For the 80 diamonds at this spec with a recently confirmed price, each taken at its cheapest confirmed price, the distribution looks like this:

  • Lowest confirmed
    $190
  • 10th percentile
    $225
  • Median
    $615
  • 75th percentile
    $814
  • 90th percentile
    $1,088
  • Highest confirmed
    $1,756

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 $225. Use the explorer to sort by price.

Sort by price

Best cut quality for the spec?

193 of 419 active listings carry Excellent or Ideal across cut, polish and symmetry.

View top-cut subset

GIA-graded only?

29 of 419 (7%) carry GIA. 17 retailers stock GIA at this spec.

Want None or Faint fluorescence?

392 of 419 are graded None or Faint at this spec.

Shopping from United States?

29 of the 34 retailers with shipping details ship to United States. 5 do not. 1 retailer has not published any shipping details.

What this spec means

  • Princess: a square brilliant cut, second only to round in popularity.
  • E color: colorless, indistinguishable from D to most viewers.
  • SI1 clarity: Slightly Included 1. Inclusions noticeable at 10x. Often still eye-clean depending on placement.
  • 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 1.5ct E SI1 princess lab grown diamonds.

Compare Aurelinne vs Carbon Sparkle

Related specs

Slightly smaller carat

princess-1-25ct-e-si1-lab

Slightly larger carat

princess-2ct-e-si1-lab

One colour grade higher

princess-1-5ct-d-si1-lab

One colour grade lower

princess-1-5ct-f-si1-lab

One clarity grade higher

princess-1-5ct-e-vs2-lab

One clarity grade lower

princess-1-5ct-e-si2-lab

Same spec, natural

princess-1-5ct-e-si1-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 1.5ct E SI1 Princess Lab Grown Diamonds | Carat Hunter