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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, 50 of them, across 15,731 current listings.

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

The market at this size and shape

Active listings

15,731

Retailers carrying

50

Median confirmed price

A$336

Grade combinations

29

Certificate mix:IGI 15,284 · GIA 5 · GCAL 5

What it actually costs

Half of these diamonds are listed between A$233 and A$568 (as of November 7, 2026).

Lower 10% A$199Median A$336Upper 10% A$752

Middle half listed between A$233 to A$568

Certificated stones with a recently confirmed price only, 1,907 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.

  5. 5Yorxs953 in stock
    Germany·Founded 2011·GIA, IGI
    Terms not yet verified
    Visit Yorxs
  6. 6Rare Carat944 in stock
    United States·Founded 2016·GCAL, IGI·30-day returns·Ships to Australia
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  8. 8B2C Jewels775 in stock
    United States·Founded 2004·IGI·30-day returns·Ships to Australia
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  10. 10Cape Diamonds535 in stock
    South Africa·Founded 2005·IGI·7-day returns·Ships to Australia
    Terms read on the retailer’s own site, June 15, 2026
    Visit Cape Diamonds
Show 40 more retailers
  8. 18

    Luvansh

    327 in stock
    US
    Terms not yet verified
  10. 20

    Steven Stone

    305 in stock
    UK·IGI
    Terms not yet verified
  12. 22GemsNY257 in stock
    United States·Founded 1988·IGI·Ships to Australia
    Terms not yet verified
    Visit GemsNY
  17. 27

    SJ Gems

    216 in stock
    ZA·IGI
    Terms not yet verified
  19. 29Allurez212 in stock
    United States·Founded 2010·IGI·Ships to Australia
    Terms not yet verified
    Visit Allurez
  24. 34

    Keyzar

    181 in stock
    US·IGI
    Terms not yet verified
  25. 35

    Liori Diamonds

    180 in stock
    US·IGI
    Terms not yet verified
  26. 36

    deBebians

    180 in stock
    US·IGI
    Terms not yet verified
  29. 39

    SkyGem

    102 in stock
    AU·IGI·Ships to Australia
    Terms not yet verified
  30. 40

    Reeds

    88 in stock
    US·IGI
    Terms not yet verified
  37. 47Zales15 in stock
    United States·Founded 1924·IGI
    Terms not yet verified
    Visit Zales
  39. 49Jared1 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.

26 of the 42 retailers with shipping details ship to Australia. 16 do not. 8 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 VVS24,787 · 41rD VS12,691 · 39rD VVS12,192 · 40rE VVS21,472 · 38rE VS11,359 · 36rE VVS1727 · 41rD VS2599 · 31rF VVS2366 · 33rE VS2309 · 25rD IF301 · 35rF VS1180 · 24rE IF159 · 34rD SI185 · 23rF VS267 · 22rG VVS264 · 21rF VVS161 · 33rE SI144 · 17rG VS130 · 19rI VS129 · 14rF IF28 · 25rH 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 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 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.