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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, 70 of them, across 109,445 current listings.

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

The market at this size and shape

Active listings

109,445

Retailers carrying

70

Median confirmed price

SGD 504

Grade combinations

30

Certificate mix:IGI 104,468 · GIA 2,542 · GCAL 962 · HRD 4

What it actually costs

Half of these diamonds are listed between SGD 368 and SGD 750 (as of October 29, 2026).

Lower 10% SGD 322Median SGD 504Upper 10% SGD 1,679

Middle half listed between SGD 368 to SGD 750

Certificated stones with a recently confirmed price only, 11,603 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

368%

Typical difference

SGD 1,667

Stones compared

9,502

Across 9,502 stones of this size and shape carried by more than one retailer, the dearest listing sits 368% above the cheapest for the identical certificated diamond, a typical gap of SGD 1,667. 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 Carat6,222 in stock
    United States·Founded 2016·30-day returns·Ships to Singapore
    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 Singapore
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  6. 6Adiamor5,429 in stock
    United States·Founded 1999·30-day returns
    Terms not yet verified
    Visit Adiamor
Show 15 more retailers
  3. 13Yorxs4,014 in stock
    Germany·Founded 2011·100-day returns
    Terms not yet verified
    Visit Yorxs
  4. 14Cape Diamonds3,537 in stock
    South Africa·Founded 2005·7-day returns·Ships to Singapore
    Terms read on the retailer’s own site, June 15, 2026
    Visit Cape Diamonds
  10. 20RockHer2,344 in stock
    United States·Founded 2016·40-day returns·Ships to Singapore
    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.

15 of the 25 retailers ship to Singapore. 10 do not.

Narrow it down by grade

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

D VVS220,520 · 57rE VVS215,618 · 58rE VS113,963 · 58rD VS112,989 · 54rD VVS111,573 · 54rE VVS14,991 · 55rF VS14,823 · 55rF VVS24,623 · 52rD VS23,086 · 48rE VS22,906 · 52rG VS12,741 · 47rD IF2,121 · 43rD FL1,908 · 39rG VVS21,694 · 42rF VS21,463 · 48rF VVS11,044 · 45rG VS2934 · 39rE IF599 · 43rH VS1557 · 40rH VVS2265 · 35rE FL236 · 27rG VVS1187 · 35rH VS2180 · 30rF IF119 · 28rG IF84 · 37rI VS180 · 27rI VS251 · 24rH VVS144 · 17rF 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 9,502 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 368%, about SGD 1,667.

Can I see retailers for one exact grade?

Yes. Each of the 30 colour 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.

Where to Buy 1.5ct Lab Grown Cushion Diamonds | Carat Hunter