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Carat Hunter · Where to buy diamonds

Where to buy a 1.5ct lab-grown marquise diamond

Every retailer in our index stocking this size and shape, 60 of them, across 139,990 current listings.

Updated October 28, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

139,990

Retailers carrying

60

Median confirmed price

$390

Grade combinations

28

Certificate mix:IGI 136,103 · GCAL 799 · GIA 309 · HRD 9

What it actually costs

Half of these diamonds are listed between $270 and $646 (as of October 28, 2026).

Lower 10% $251Median $390Upper 10% $1,210

Middle half listed between $270 to $646

Certificated stones with a recently confirmed price only, 11,917 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

338%

Typical difference

$1,170

Stones compared

9,544

Across 9,544 stones of this size and shape carried by more than one retailer, the dearest listing sits 338% above the cheapest for the identical certificated diamond, a typical gap of $1,170. That gap is what comparing before you buy avoids.

Every retailer that stocks this spec

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

  1. 1Rare Carat9,551 in stock
    United States·Founded 2016·30-day returns·Ships to United States
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  9. 9Brilliance4,726 in stock
    United States·Founded 2002·30-day returns·Ships to United States
    Terms not yet verified
    Visit Brilliance
  10. 10NZ Jewellers4,671 in stock
    New Zealand·Founded 2006·30-day returns·Ships to United States
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
Show 15 more retailers
  3. 13Moon Ocean4,426 in stock
    United Kingdom·Founded 2022·30-day returns·Ships to United States
    Terms not yet verified
    Visit Moon Ocean
  4. 14B2C Jewels4,248 in stock
    United States·Founded 2004·30-day returns·Ships to United States
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  5. 15Adiamor4,198 in stock
    United States·Founded 1999·30-day returns·Ships to United States
    Terms not yet verified
    Visit Adiamor
  6. 16

    The Perfect Carat

    3,995 in stock
    US
    Terms not yet verified
  7. 17Aurelinne3,918 in stock
    United States·Founded 2021·30-day returns·Ships to United States
    Terms not yet verified
    Visit Aurelinne
  8. 18Cape Diamonds3,350 in stock
    South Africa·Founded 2005·7-day returns·Ships to United States
    Terms read on the retailer’s own site, June 15, 2026
    Visit Cape Diamonds
  11. 21GemsNY3,127 in stock
    United States·Founded 1988·30-day returns·Ships to United States
    Terms not yet verified
    Visit GemsNY
  12. 22Yorxs2,942 in stock
    Germany·Founded 2011·100-day returns
    Terms not yet verified
    Visit Yorxs

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.

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

Narrow it down by grade

Each combination below has its own page with the retailers that stock exactly that grade.

E VVS225,462 · 57rE VS118,216 · 55rD VVS217,462 · 57rD VVS112,302 · 55rD VS110,999 · 53rF VVS29,751 · 56rD FL8,066 · 43rE VVS17,565 · 52rD IF7,464 · 48rF VS16,423 · 49rE VS25,924 · 44rD VS22,412 · 46rE IF1,478 · 44rF VVS11,454 · 51rG VVS21,444 · 43rF VS21,388 · 40rG VS1762 · 38rE FL597 · 34rF IF169 · 31rH VS1147 · 25rG VS2141 · 32rG IF101 · 28rG VVS180 · 29rH VVS268 · 20rH VS238 · 11rH VVS130 · 7rI VS215 · 11rF FL14 · 14r

Stones at this spec now

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

What this spec means

  • Marquise: a pointed-end ellipse that faces up large for its carat.
  • Lab-grown: chemically identical to natural diamonds, typically at least 90% less than a comparable natural cohort from 1 carat up.

Frequently asked

How much do retailers differ on the same diamond?

Across 9,544 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 338%, about $1,170.

Can I see retailers for one exact grade?

Yes. Each of the 28 color and clarity combinations above has its own page listing the retailers that stock exactly that grade.

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.

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.