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Carat Hunter · Where to buy diamonds

Where to buy a 0.5ct lab-grown round diamond

Every retailer in our index stocking this size and shape, 63 of them, across 378,062 current listings.

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

The market at this size and shape

Active listings

378,062

Retailers carrying

63

Median confirmed price

NZ$315

Grade combinations

55

Certificate mix:IGI 358,032 · GIA 1,350 · GCAL 1,136 · HRD 419 · AGS 6

What it actually costs

Half of these diamonds are listed between NZ$258 and NZ$525 (as of November 6, 2026).

Lower 10% NZ$183Median NZ$315Upper 10% NZ$738

Middle half listed between NZ$258 to NZ$525

Certificated stones with a recently confirmed price only, 40,991 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

As of November 5, 2026, the same certified diamond typically costs 44% more at a typical retailer than at the cheapest for lab-grown stones, and 19% 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.

  5. 5B2C Jewels24,018 in stock
    United States·Founded 2004·AGS, GCAL, GIA, HRD·30-day returns·Ships to New Zealand
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  7. 7Carbon Sparkle17,571 in stock
    United States·GCAL, GIA, HRD, IGI·21-day returns·Ships to New Zealand
    Terms read on the retailer’s own site, September 2, 2026
    Visit Carbon Sparkle
  8. 8Rare Carat16,295 in stock
    United States·Founded 2016·GCAL, GIA, HRD, IGI·30-day returns·Ships to New Zealand
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  9. 9NZ Jewellers15,868 in stock
    New Zealand·Founded 2006·GCAL, GIA, IGI·30-day returns·Ships to New Zealand
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
  10. 10Yorxs15,394 in stock
    Germany·Founded 2011·AGS, GIA, HRD, IGI
    Terms not yet verified
    Visit Yorxs
Show 53 more retailers
  1. 11Aurelinne14,962 in stock
    United States·Founded 2021·GCAL, GIA, HRD, IGI·Ships to New Zealand
    Terms not yet verified
    Visit Aurelinne
  2. 12

    The Perfect Carat

    14,609 in stock
    US·GCAL, GIA, HRD, IGI
    Terms not yet verified
  7. 17Cape Diamonds8,225 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
  14. 24GemsNY4,392 in stock
    United States·Founded 1988·GIA, IGI·Ships to New Zealand
    Terms not yet verified
    Visit GemsNY
  20. 30Allurez2,249 in stock
    United States·Founded 2010·IGI·Ships to New Zealand
    Terms not yet verified
    Visit Allurez
  31. 4125karats123 in stock
    United States·Founded 2008·IGI·60-day returns·Ships to New Zealand
    Terms read on the retailer’s own site, June 15, 2026
    Visit 25karats
  33. 43ZCOVA67 in stock
    Malaysia·Founded 2015·IGI·Ships to New Zealand
    Terms not yet verified
    Visit ZCOVA
  38. 48

    Diamond Culture

    9 in stock
    HK·GIA, IGI
    Terms not yet verified
  44. 54

    Diamovida

    4 in stock
    CA·GIA, IGI
    Terms not yet verified
  45. 55RockHer4 in stock
    United States·Founded 2016·GIA, IGI·Ships to New Zealand
    Terms not yet verified
    Visit RockHer
  47. 57Jared3 in stock
    United States·Founded 1993·IGI
    Terms not yet verified
    Visit Jared
  49. 59Zales3 in stock
    United States·Founded 1924·IGI
    Terms not yet verified
    Visit Zales

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.

34 of the 59 retailers with shipping details ship to New Zealand. 25 do not. 4 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 VVS2130,227 · 45rD VS162,465 · 44rD VVS159,179 · 47rE VVS228,163 · 42rE VS120,943 · 41rD IF15,105 · 40rE VVS114,839 · 42rD FL12,409 · 32rD VS211,224 · 41rE VS24,481 · 36rF VVS23,445 · 36rD SI12,511 · 29rE IF2,300 · 41rF VS12,182 · 36rE SI11,486 · 29rF VVS11,467 · 41rF VS2543 · 31rG VVS2479 · 33rE FL382 · 31rD SI2361 · 21rI VS2351 · 26rE SI2343 · 25rF IF326 · 36rH VVS2292 · 27rG VVS1286 · 29rI VS1267 · 23rF SI1218 · 23rG VS1205 · 28rH VS1133 · 26rG VS2127 · 23rI VVS2117 · 24rG IF109 · 26rG SI1107 · 21rI SI196 · 20rG SI287 · 20rF SI283 · 14rI VVS181 · 22rH VS274 · 20rF FL61 · 20rJ VVS259 · 20rH IF54 · 24rH SI150 · 22rH VVS144 · 21rK VVS238 · 16rJ VS234 · 18rI SI232 · 14rJ VVS125 · 7rJ SI124 · 16rK SI224 · 12rH SI220 · 10rJ SI220 · 13rJ VS119 · 7rJ IF12 · 3rK SI111 · 6rK VS211 · 8r

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

  • Round: the most common cut, with the highest light return per carat.
  • 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 5, 2026, the same certified diamond typically costs 44% more at a typical retailer than at the cheapest for lab-grown stones, and 19% 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 55 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.