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Carat Hunter · Where to buy diamonds

Where to buy a 1.25ct lab-grown radiant diamond

Every retailer in our index stocking this size and shape, 57 of them, across 18,979 live listings.

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

The market at this size and shape

Active listings

18,979

Retailers carrying

57

Median active price

NZ$868

Grade combinations

27

Certificate mix:IGI 17,172 · GIA 1,009 · GCAL 261

What it actually costs

Lower 10% NZ$347Median NZ$868Upper 10% NZ$2,801

Middle half sell between NZ$593 to NZ$1,855

Certificated stones with a live price only, 5,302 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

189%

Typical difference

NZ$1,283

Stones compared

2,853

Across 2,853 stones of this size and shape carried by more than one retailer, the dearest listing sits 189% above the cheapest for the identical certificated diamond, a typical gap of NZ$1,283. 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.

1 of the 25 retailers ship to New Zealand. 24 do not.

Narrow it down by grade

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

D VVS22,947 · 47rD VS12,438 · 39rD VVS12,187 · 40rE VS11,738 · 41rE VVS21,657 · 44rF VS11,209 · 41rG VS11,110 · 37rF VVS2826 · 38rE VVS1769 · 42rD IF765 · 32rE VS2453 · 31rD FL444 · 26rG VVS2409 · 32rD VS2356 · 34rF VS2346 · 30rG VS2338 · 31rE IF308 · 31rH VS1161 · 31rF VVS1126 · 19rH VVS2125 · 24rI VS163 · 17rF IF44 · 23rG VVS135 · 15rH VS232 · 13rI VVS225 · 16rE FL22 · 15rI VS216 · 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

  • Radiant: a rectangular brilliant cut that combines the emerald outline with round-style faceting.
  • 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 2,853 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 189%, about NZ$1,283.

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 Radiant Diamonds | Carat Hunter