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Carat Hunter · Where to buy diamonds

Where to buy a 1ct lab-grown cushion diamond

Every retailer in our index stocking this size and shape, 61 of them, across 139,105 current listings.

Updated November 4, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

139,105

Retailers carrying

61

Median confirmed price

SGD 360

Grade combinations

30

Certificate mix:IGI 134,672 · GIA 1,471 · GCAL 844 · HRD 24

What it actually costs

Half of these diamonds are listed between SGD 258 and SGD 555 (as of November 4, 2026).

Lower 10% SGD 239Median SGD 360Upper 10% SGD 898

Middle half listed between SGD 258 to SGD 555

Certificated stones with a recently confirmed price only, 17,512 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

343%

Typical difference

SGD 1,134

Stones compared

14,127

Across 14,127 stones of this size and shape carried by more than one retailer, the dearest listing sits 343% above the cheapest for the identical certificated diamond, a typical gap of SGD 1,134. 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.

  5. 5Adiamor7,655 in stock
    United States·Founded 1999·30-day returns
    Terms not yet verified
    Visit Adiamor
  6. 6B2C Jewels7,640 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
  8. 8Rare Carat6,716 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
  10. 10Yorxs5,700 in stock
    Germany·Founded 2011·100-day returns
    Terms not yet verified
    Visit Yorxs
Show 15 more retailers
  3. 13Cape Diamonds4,910 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

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.

12 of the 25 retailers ship to Singapore. 13 do not.

Narrow it down by grade

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

D VVS231,289 · 57rD VS121,995 · 55rE VS118,103 · 55rD VVS117,165 · 55rE VVS215,283 · 56rE VVS16,123 · 53rD VS25,034 · 50rE VS24,554 · 49rF VS13,988 · 52rF VVS23,514 · 54rD IF2,856 · 49rD FL2,010 · 37rF VS21,396 · 42rE IF1,157 · 43rG VS11,112 · 42rG VVS2904 · 47rF VVS1849 · 50rE FL441 · 27rG VS2404 · 32rH VS1257 · 30rH VVS2171 · 29rF IF112 · 35rG VVS1111 · 30rH VS2106 · 21rI VS141 · 20rF FL34 · 20rI VS228 · 13rH VVS126 · 14rI VVS221 · 14rG FL13 · 13r

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 14,127 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 343%, about SGD 1,134.

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.