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Carat Hunter · Where to buy diamonds

Where to buy a 3ct lab-grown princess diamond

Every retailer in our index stocking this size and shape, 57 of them, across 70,072 live listings.

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

The market at this size and shape

Active listings

70,072

Retailers carrying

57

Median active price

NZ$1,545

Grade combinations

29

Certificate mix:IGI 60,874 · GIA 5,987 · GCAL 1,259 · HRD 50

What it actually costs

Lower 10% NZ$907Median NZ$1,545Upper 10% NZ$8,167

Middle half sell between NZ$1,203 to NZ$3,035

Certificated stones with a live price only, 14,081 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

396%

Typical difference

NZ$5,632

Stones compared

8,116

Across 8,116 stones of this size and shape carried by more than one retailer, the dearest listing sits 396% above the cheapest for the identical certificated diamond, a typical gap of NZ$5,632. 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.

E VVS212,119 · 46rE VS111,605 · 46rF VVS27,890 · 43rF VS16,041 · 44rD VS15,292 · 44rD VVS24,581 · 47rG VS13,321 · 40rG VVS22,594 · 37rD VVS12,116 · 39rE VS22,096 · 38rD FL1,891 · 25rD IF1,811 · 36rE VVS11,761 · 36rF VS21,308 · 40rG VS21,250 · 29rH VS11,187 · 33rF VVS1865 · 36rD VS2671 · 35rH VVS2564 · 29rH VS2371 · 28rI VS1227 · 27rG VVS1135 · 27rE IF125 · 27rI VS288 · 19rE FL77 · 22rI VVS228 · 14rH VVS122 · 3rF FL15 · 14rI VVS113 · 12r

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

  • Princess: a square brilliant cut, second only to round in popularity.
  • 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 8,116 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 396%, about NZ$5,632.

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 3ct Lab Grown Princess Diamonds | Carat Hunter