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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 14,772 live listings.

Updated September 18, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

14,772

Retailers carrying

55

Median active price

A$739

Grade combinations

27

Certificate mix:IGI 13,254 · GIA 772 · GCAL 180 · HRD 9

What it actually costs

Lower 10% A$353Median A$739Upper 10% A$2,107

Middle half sell between A$526 to A$1,490

Certificated stones with a live price only, 4,409 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

156%

Typical difference

A$923

Stones compared

2,407

Across 2,407 stones of this size and shape carried by more than one retailer, the dearest listing sits 156% above the cheapest for the identical certificated diamond, a typical gap of A$923. 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.

2 of the 25 retailers ship to Australia. 23 do not.

Narrow it down by grade

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

D VVS22,927 · 46rD VS12,273 · 41rE VVS21,793 · 42rE VS11,650 · 41rD VVS11,329 · 40rE VS2618 · 37rF VS1609 · 39rE VVS1599 · 37rF VVS2491 · 37rD VS2478 · 31rG VVS2380 · 33rD IF256 · 31rF VS2248 · 33rG VS1207 · 26rD FL196 · 24rE IF143 · 24rG VS2118 · 25rF IF94 · 29rF VVS178 · 28rH VS167 · 19rG VVS148 · 20rH VVS247 · 16rH VS233 · 10rH VVS122 · 5rI VS222 · 12rI VS116 · 10rE FL15 · 11r

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 2,407 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 156%, about A$923.

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