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Carat Hunter · Where to buy diamonds

Where to buy a 0.5ct lab-grown cushion diamond

Every retailer in our index stocking this size and shape, 42 of them, across 15,455 current listings.

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

The market at this size and shape

Active listings

15,455

Retailers carrying

42

Median confirmed price

NZ$451

Grade combinations

29

Certificate mix:IGI 15,008 · GIA 5 · GCAL 5

What it actually costs

Half of these diamonds are listed between NZ$303 and NZ$710 (as of November 6, 2026).

Lower 10% NZ$249Median NZ$451Upper 10% NZ$928

Middle half listed between NZ$303 to NZ$710

Certificated stones with a recently confirmed price only, 1,914 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.

  5. 5Rare Carat944 in stock
    United States·Founded 2016·GCAL, IGI·30-day returns·Ships to New Zealand
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  6. 6Yorxs925 in stock
    Germany·Founded 2011·GIA, IGI
    Terms not yet verified
    Visit Yorxs
  7. 7B2C Jewels780 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
  10. 10Cape Diamonds526 in stock
    South Africa·Founded 2005·IGI·7-day returns·Ships to New Zealand
    Terms read on the retailer’s own site, June 15, 2026
    Visit Cape Diamonds
Show 32 more retailers
  10. 20GemsNY257 in stock
    United States·Founded 1988·IGI·Ships to New Zealand
    Terms not yet verified
    Visit GemsNY
  15. 25Allurez212 in stock
    United States·Founded 2010·IGI·Ships to New Zealand
    Terms not yet verified
    Visit Allurez
  29. 39Zales15 in stock
    United States·Founded 1924·IGI
    Terms not yet verified
    Visit Zales
  31. 41Jared1 in stock
    United States·Founded 1993·IGI
    Terms not yet verified
    Visit Jared

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.

20 of the 41 retailers with shipping details ship to New Zealand. 21 do not. 1 retailer has 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 VVS24,720 · 39rD VS12,643 · 37rD VVS12,111 · 38rE VVS21,453 · 36rE VS11,344 · 34rE VVS1708 · 39rD VS2596 · 30rF VVS2360 · 31rE VS2309 · 25rD IF297 · 33rF VS1180 · 24rE IF151 · 32rD SI183 · 22rF VS267 · 22rG VVS264 · 21rF VVS158 · 31rE SI145 · 17rG VS130 · 19rI VS129 · 14rF IF26 · 23rH VS224 · 16rG VVS121 · 16rJ VS116 · 14rE SI214 · 7rG VS214 · 9rD FL13 · 13rF SI212 · 7rG SI112 · 12rH VS112 · 12r

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

  • Cushion: a softened-corner square or rectangle with a vintage feel.
  • 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 29 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.