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Carat Hunter · Where to buy diamonds

Where to buy a 0.5ct lab-grown heart diamond

Every retailer in our index stocking this size and shape, 38 of them, across 9,386 live listings.

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

The market at this size and shape

Active listings

9,386

Retailers carrying

38

Median active price

NZ$415

Grade combinations

21

Certificate mix:IGI 8,511 · GIA 35

What it actually costs

Lower 10% NZ$201Median NZ$415Upper 10% NZ$858

Middle half sell between NZ$312 to NZ$619

Certificated stones with a live price only, 2,016 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

173%

Typical difference

NZ$610

Stones compared

1,298

Across 1,298 stones of this size and shape carried by more than one retailer, the dearest listing sits 173% above the cheapest for the identical certificated diamond, a typical gap of NZ$610. 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 June 15, 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 VVS22,353 · 33rD VS12,074 · 27rE VVS21,149 · 29rD VVS1842 · 27rE VS1781 · 24rD VS2341 · 23rE VS2285 · 22rF VVS2272 · 25rE VVS1272 · 25rD IF223 · 22rF VS1171 · 23rD FL141 · 11rF VS283 · 15rG VVS274 · 17rG VS155 · 18rG VS249 · 8rF VVS147 · 15rH VS130 · 5rE IF28 · 13rH VVS221 · 13rF IF14 · 10r

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

  • Heart: a brilliant cut with a cleft and a pointed tip, classic and recognizable.
  • 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 1,298 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 173%, about NZ$610.

Can I see retailers for one exact grade?

Yes. Each of the 21 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 0.5ct Lab Grown Heart Diamonds | Carat Hunter