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Carat Hunter · Where to buy diamonds

Where to buy a 1.25ct lab-grown cushion diamond

Every retailer in our index stocking this size and shape, 55 of them, across 14,221 live listings.

Updated September 14, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

14,221

Retailers carrying

55

Median active price

HK$4,117

Grade combinations

27

Certificate mix:IGI 12,687 · GIA 775 · GCAL 182 · HRD 7

What it actually costs

Lower 10% HK$2,116Median HK$4,117Upper 10% HK$11,762

Middle half sell between HK$2,862 to HK$8,352

Certificated stones with a live price only, 4,360 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

170%

Typical difference

HK$5,560

Stones compared

2,301

Across 2,301 stones of this size and shape carried by more than one retailer, the dearest listing sits 170% above the cheapest for the identical certificated diamond, a typical gap of HK$5,560. 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.

Show 15 more retailers

Stock counts are updated daily. Founded, return window and shipping details are retailer-provided and were last verified September 2, 2026.

Narrow it down by grade

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

D VVS22,809 · 46rD VS12,217 · 41rE VVS21,724 · 43rE VS11,594 · 42rD VVS11,253 · 40rE VS2604 · 36rF VS1570 · 39rE VVS1561 · 37rF VVS2479 · 37rD VS2461 · 30rG VVS2348 · 33rD IF255 · 30rF VS2248 · 33rG VS1195 · 26rD FL190 · 24rE IF143 · 24rG VS2117 · 25rF IF93 · 28rF VVS178 · 29rH VS167 · 19rH VVS250 · 16rG VVS148 · 19rH VS232 · 9rH VVS122 · 5rI VS222 · 13rI VS116 · 10rE FL10 · 10r

Stones at this spec now

Live 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 60% to 80% less than a comparable natural cohort.

Frequently asked

How much do retailers differ on the same diamond?

Across 2,301 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 170%, about HK$5,560.

Can I see retailers for one exact grade?

Yes. Each of the 27 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?

Live listings refresh daily. 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 1.25ct Lab Grown Cushion Diamonds | Carat Hunter