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Carat Hunter · Where to buy diamonds

Where to buy a 0.5ct lab-grown radiant diamond

Every retailer in our index stocking this size and shape, 47 of them, across 38,391 current listings.

Updated November 4, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

38,391

Retailers carrying

47

Median confirmed price

A$309

Grade combinations

26

Certificate mix:IGI 36,561 · GCAL 183 · GIA 31 · HRD 5

What it actually costs

Half of these diamonds are listed between A$187 and A$565 (as of November 4, 2026).

Lower 10% A$160Median A$309Upper 10% A$730

Middle half listed between A$187 to A$565

Certificated stones with a recently confirmed price only, 3,387 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

516%

Typical difference

A$1,276

Stones compared

2,370

Across 2,370 stones of this size and shape carried by more than one retailer, the dearest listing sits 516% above the cheapest for the identical certificated diamond, a typical gap of A$1,276. That gap is what comparing before you buy avoids.

Every retailer that stocks this spec

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

  1. 1Rare Carat2,324 in stock
    United States·Founded 2016·30-day returns·Ships to Australia
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  2. 2Aurelinne2,300 in stock
    United States·Founded 2021·30-day returns·Ships to Australia
    Terms not yet verified
    Visit Aurelinne
  4. 4NZ Jewellers2,124 in stock
    New Zealand·Founded 2006·30-day returns·Ships to Australia
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
  6. 6

    The Perfect Carat

    2,036 in stock
    US
    Terms not yet verified
  10. 10B2C Jewels1,478 in stock
    United States·Founded 2004·30-day returns·Ships to Australia
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
Show 15 more retailers
  2. 12Yorxs1,392 in stock
    Germany·Founded 2011·100-day returns
    Terms not yet verified
    Visit Yorxs
  3. 13Cape Diamonds1,358 in stock
    South Africa·Founded 2005·7-day returns·Ships to Australia
    Terms read on the retailer’s own site, June 15, 2026
    Visit Cape Diamonds

Stock counts are updated daily. 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.

17 of the 25 retailers ship to Australia. 8 do not.

Narrow it down by grade

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

D VVS113,478 · 43rD VVS26,321 · 40rD VS13,373 · 38rD IF3,123 · 40rE VVS22,470 · 39rE VS11,935 · 37rE VVS11,911 · 39rF VVS2888 · 36rD VS2829 · 33rG VVS2672 · 32rD FL539 · 24rE VS2525 · 30rF VS1492 · 31rG VS1466 · 28rE IF370 · 37rF VVS1226 · 34rF VS2193 · 25rG VS2177 · 26rH VS1111 · 22rE FL62 · 23rF IF54 · 25rH VS253 · 25rG VVS146 · 22rH VVS240 · 22rI VS215 · 14rI VVS113 · 13r

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

  • Radiant: a rectangular brilliant cut that combines the emerald outline with round-style faceting.
  • 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?

Across 2,370 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 516%, about A$1,276.

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.