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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, 52 of them, across 16,100 current listings.

Updated November 7, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

16,100

Retailers carrying

52

Median confirmed price

NZ$327

Grade combinations

26

Certificate mix:IGI 15,426 · GIA 10

What it actually costs

Half of these diamonds are listed between NZ$245 and NZ$530 (as of November 7, 2026).

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

Middle half listed between NZ$245 to NZ$530

Certificated stones with a recently confirmed price only, 1,503 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

As of November 7, 2026, the same certified diamond typically costs 44% more at a typical retailer than at the cheapest for lab-grown stones, and 21% 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.

  6. 6NZ Jewellers974 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 Jewels809 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 42 more retailers
  3. 13Cape Diamonds556 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
  7. 17

    SkyGem

    410 in stock
    AU·GIA, IGI
    Terms not yet verified
  9. 19

    Luvansh

    387 in stock
    US
    Terms not yet verified
  12. 22

    Steven Stone

    335 in stock
    UK·GIA, IGI
    Terms not yet verified
  21. 31Rare 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
  22. 32

    Keyzar

    40 in stock
    US·IGI
    Terms not yet verified
  23. 33

    Reeds

    37 in stock
    US·IGI
    Terms not yet verified
  25. 35Allurez21 in stock
    United States·Founded 2010·IGI·Ships to New Zealand
    Terms not yet verified
    Visit Allurez
  26. 36GemsNY21 in stock
    United States·Founded 1988·IGI·Ships to New Zealand
    Terms not yet verified
    Visit GemsNY
  31. 41

    deBebians

    5 in stock
    US
    Terms not yet verified
  33. 43

    USA Jewels

    3 in stock
    US·IGI
    Terms not yet verified
  36. 46Zales2 in stock
    United States·Founded 1924·IGI
    Terms not yet verified
    Visit Zales
  39. 49RockHer1 in stock
    United States·Founded 2016·GIA·Ships to New Zealand
    Terms not yet verified
    Visit RockHer
  40. 50

    SJ Gems

    1 in stock
    ZA·IGI
    Terms not yet verified
  42. 52

    Velur

    1 in stock
    DE·GIA
    Terms not yet verified

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. 11 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 VVS23,893 · 37rD VS13,737 · 37rE VVS21,647 · 34rD VVS11,605 · 30rE VS11,122 · 30rD VS2784 · 29rD IF523 · 29rD FL515 · 18rE VVS1498 · 31rF VVS2432 · 30rF VS1324 · 26rE VS2311 · 28rG VVS2138 · 21rE IF104 · 21rD SI195 · 27rG VS167 · 24rF VS253 · 19rE SI152 · 22rE FL42 · 18rF VVS137 · 21rF SI124 · 17rG VS223 · 14rE SI222 · 11rH VS122 · 8rH 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 7, 2026, the same certified diamond typically costs 44% more at a typical retailer than at the cheapest for lab-grown stones, and 21% 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.