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Carat Hunter · Where to buy diamonds

Where to buy a 3ct lab-grown marquise diamond

Every retailer in our index stocking this size and shape, 58 of them, across 79,137 live listings.

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

The market at this size and shape

Active listings

79,137

Retailers carrying

58

Median active price

NZ$2,130

Grade combinations

28

Certificate mix:IGI 75,911 · GCAL 651 · GIA 570 · HRD 2

What it actually costs

Lower 10% NZ$1,135Median NZ$2,130Upper 10% NZ$7,819

Middle half sell between NZ$1,445 to NZ$4,007

Certificated stones with a live price only, 22,860 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

152%

Typical difference

NZ$2,454

Stones compared

11,693

Across 11,693 stones of this size and shape carried by more than one retailer, the dearest listing sits 152% above the cheapest for the identical certificated diamond, a typical gap of NZ$2,454. 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.

F VVS213,617 · 44rE VS110,107 · 49rE VVS210,026 · 48rF VS19,530 · 43rG VVS28,535 · 35rG VS14,519 · 34rD VVS24,082 · 49rE VS23,912 · 36rD VS12,341 · 42rD VVS12,088 · 45rE VVS11,916 · 43rF VS21,676 · 31rD FL1,422 · 26rD IF1,028 · 35rH VVS2852 · 21rF VVS1736 · 39rD VS2643 · 31rH VS1568 · 19rG VVS1432 · 23rE IF414 · 30rG VS2282 · 22rH VVS1111 · 14rE FL106 · 23rH VS289 · 16rF IF66 · 22rI VVS213 · 10rG IF12 · 11rI VS112 · 8r

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

  • Marquise: a pointed-end ellipse that faces up large for its carat.
  • 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 11,693 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 152%, about NZ$2,454.

Can I see retailers for one exact grade?

Yes. Each of the 28 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 Marquise Diamonds | Carat Hunter