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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, 43 of them, across 16,064 current listings.

Updated November 6, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

16,064

Retailers carrying

43

Median confirmed price

NZ$327

Grade combinations

26

Certificate mix:IGI 15,396 · GIA 10

What it actually costs

Half of these diamonds are listed between NZ$245 and NZ$540 (as of November 6, 2026).

Lower 10% NZ$197Median NZ$327Upper 10% NZ$884

Middle half listed between NZ$245 to NZ$540

Certificated stones with a recently confirmed price only, 1,490 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

As of November 6, 2026, the same certified diamond typically costs 44% more at a typical retailer than at the cheapest for lab-grown stones, and 20% more for natural ones (the median across stones listed by two or more retailers). Comparing shows you the cheapest of the retailers listing the same stone.

Every retailer that stocks this spec

Ranked by active inventory count. Selection is mechanical, not editorial.

  4. 4NZ Jewellers1,040 in stock
    New Zealand·Founded 2006·IGI·30-day returns·Ships to New Zealand
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
  8. 8

    The Perfect Carat

    906 in stock
    US·IGI
    Terms not yet verified
  9. 9B2C Jewels810 in stock
    United States·Founded 2004·IGI·30-day returns·Ships to New Zealand
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
Show 33 more retailers
  2. 12Cape Diamonds540 in stock
    South Africa·Founded 2005·GIA, IGI·7-day returns·Ships to New Zealand
    Terms read on the retailer’s own site, June 15, 2026
    Visit Cape Diamonds
  18. 28Rare Carat69 in stock
    United States·Founded 2016·IGI·30-day returns·Ships to New Zealand
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  20. 30Allurez21 in stock
    United States·Founded 2010·IGI·Ships to New Zealand
    Terms not yet verified
    Visit Allurez
  21. 31GemsNY21 in stock
    United States·Founded 1988·IGI·Ships to New Zealand
    Terms not yet verified
    Visit GemsNY
  29. 39Zales2 in stock
    United States·Founded 1924·IGI
    Terms not yet verified
    Visit Zales
  32. 42RockHer1 in stock
    United States·Founded 2016·GIA·Ships to New Zealand
    Terms not yet verified
    Visit RockHer

Stock counts reflect current listings. Founded and shipping details come from public sources. Return terms are our summary of each retailer's own policy page, dated per retailer above. Retailers change their terms, so check the retailer's own returns and shipping pages before you buy.

25 of the 41 retailers with shipping details ship to New Zealand. 16 do not. 2 retailers have not published any shipping details.

Narrow it down by grade

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

D VVS23,904 · 35rD VS13,716 · 35rE VVS21,651 · 32rD VVS11,613 · 30rE VS11,109 · 28rD VS2780 · 29rD IF523 · 28rD FL511 · 18rE VVS1499 · 31rF VVS2426 · 28rF VS1314 · 26rE VS2310 · 26rG VVS2138 · 21rE IF104 · 21rD SI194 · 26rG VS167 · 24rF VS255 · 19rE SI151 · 21rE FL42 · 18rF VVS137 · 21rF SI124 · 17rG VS223 · 14rE SI222 · 11rH VS121 · 7rH VS211 · 5rF IF10 · 10r

Stones at this spec now

Current 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 at least 90% less than a comparable natural cohort from 1 carat up.

Frequently asked

How much do retailers differ on the same diamond?

As of November 6, 2026, the same certified diamond typically costs 44% more at a typical retailer than at the cheapest for lab-grown stones, and 20% more for natural ones (the median across stones listed by two or more retailers). Comparing shows you the cheapest of the retailers listing the same stone.

Can I see retailers for one exact grade?

Yes. Each of the 26 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?

Listings refresh as we re-read each retailer, most of them every day. 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.