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Carat Hunter · Where to buy diamonds

Where to buy a 1.5ct lab-grown cushion diamond

Every retailer in our index stocking this size and shape, 69 of them, across 109,440 current listings.

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

The market at this size and shape

Active listings

109,440

Retailers carrying

69

Median confirmed price

$395

Grade combinations

30

Certificate mix:IGI 104,436 · GIA 2,543 · GCAL 968 · HRD 4

What it actually costs

Half of these diamonds are listed between $287 and $585 (as of October 28, 2026).

Lower 10% $251Median $395Upper 10% $1,319

Middle half listed between $287 to $585

Certificated stones with a recently confirmed price only, 11,552 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

374%

Typical difference

$1,321

Stones compared

9,507

Across 9,507 stones of this size and shape carried by more than one retailer, the dearest listing sits 374% above the cheapest for the identical certificated diamond, a typical gap of $1,321. 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.

  4. 4Rare Carat6,271 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
  5. 5B2C Jewels5,930 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
  7. 7Adiamor5,442 in stock
    United States·Founded 1999·30-day returns·Ships to United States
    Terms not yet verified
    Visit Adiamor
  9. 9Moon Ocean5,148 in stock
    United Kingdom·Founded 2022·30-day returns·Ships to United States
    Terms not yet verified
    Visit Moon Ocean
  10. 10Brilliance5,040 in stock
    United States·Founded 2002·30-day returns·Ships to United States
    Terms not yet verified
    Visit Brilliance
Show 15 more retailers
  3. 13Yorxs4,014 in stock
    Germany·Founded 2011·100-day returns
    Terms not yet verified
    Visit Yorxs
  4. 14Cape Diamonds3,432 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
  9. 19RockHer2,366 in stock
    United States·Founded 2016·40-day returns·Ships to United States
    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.

20 of the 25 retailers ship to United States. 5 do not.

Narrow it down by grade

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

D VVS220,513 · 57rE VVS215,625 · 58rE VS114,023 · 59rD VS113,029 · 54rD VVS111,527 · 54rE VVS14,953 · 55rF VS14,827 · 55rF VVS24,641 · 53rD VS23,092 · 48rE VS22,900 · 51rG VS12,741 · 47rD IF2,102 · 43rD FL1,903 · 39rG VVS21,688 · 42rF VS21,456 · 48rF VVS11,036 · 45rG VS2931 · 39rE IF597 · 43rH VS1561 · 40rH VVS2271 · 35rE FL231 · 27rG VVS1190 · 35rH VS2180 · 30rF IF119 · 28rG IF84 · 37rI VS180 · 27rI VS251 · 24rH VVS143 · 16rF FL23 · 18rI VVS223 · 8r

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

  • Cushion: a softened-corner square or rectangle with a vintage feel.
  • 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 9,507 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 374%, about $1,321.

Can I see retailers for one exact grade?

Yes. Each of the 30 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.