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Carat Hunter · Where to buy diamonds

Where to buy a 1.5ct lab-grown radiant diamond

Every retailer in our index stocking this size and shape, 60 of them, across 83,052 live listings.

Updated September 17, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

83,052

Retailers carrying

60

Median active price

NZ$848

Grade combinations

29

Certificate mix:IGI 76,298 · GIA 4,604 · GCAL 681 · HRD 5

What it actually costs

Lower 10% NZ$354Median NZ$848Upper 10% NZ$3,424

Middle half sell between NZ$646 to NZ$2,248

Certificated stones with a live price only, 20,472 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

208%

Typical difference

NZ$1,545

Stones compared

11,608

Across 11,608 stones of this size and shape carried by more than one retailer, the dearest listing sits 208% above the cheapest for the identical certificated diamond, a typical gap of NZ$1,545. 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 VVS213,215 · 53rE VVS211,108 · 49rD VS110,101 · 51rD VVS19,287 · 47rE VS18,690 · 48rE VVS14,192 · 43rF VVS23,777 · 45rF VS13,755 · 42rD IF3,588 · 39rG VS12,398 · 36rE VS22,101 · 35rD FL1,674 · 29rD VS21,610 · 36rG VVS21,329 · 38rE IF977 · 37rF VS2969 · 34rF VVS1968 · 38rG VS2870 · 32rH VS1775 · 32rH VVS2458 · 32rH VS2237 · 29rE FL236 · 25rF IF183 · 29rG VVS1142 · 28rG IF96 · 21rI VS195 · 21rI VVS290 · 19rI VS269 · 18rH IF33 · 21r

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 11,608 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 208%, about NZ$1,545.

Can I see retailers for one exact grade?

Yes. Each of the 29 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 1.5ct Lab Grown Radiant Diamonds | Carat Hunter