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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 38,780 current listings.

Updated October 30, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

38,780

Retailers carrying

47

Median confirmed price

A$315

Grade combinations

26

Certificate mix:IGI 36,855 · GCAL 180 · GIA 29 · HRD 6

What it actually costs

Half of these diamonds are listed between A$185 and A$562 (as of October 30, 2026).

Lower 10% A$159Median A$315Upper 10% A$729

Middle half listed between A$185 to A$562

Certificated stones with a recently confirmed price only, 3,437 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

544%

Typical difference

A$1,268

Stones compared

2,431

Across 2,431 stones of this size and shape carried by more than one retailer, the dearest listing sits 544% above the cheapest for the identical certificated diamond, a typical gap of A$1,268. 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 Carat2,322 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. 2Aurelinne2,233 in stock
    United States·Founded 2021·30-day returns·Ships to Australia
    Terms not yet verified
    Visit Aurelinne
  5. 5NZ Jewellers2,004 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
  7. 7

    The Perfect Carat

    1,865 in stock
    US
    Terms not yet verified
  10. 10B2C Jewels1,579 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. 12Yorxs1,422 in stock
    Germany·Founded 2011·100-day returns
    Terms not yet verified
    Visit Yorxs
  3. 13Cape Diamonds1,352 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 VVS113,772 · 43rD VVS26,388 · 39rD VS13,414 · 39rD IF3,114 · 40rE VVS22,429 · 39rE VVS11,984 · 39rE VS11,920 · 37rF VVS2864 · 37rD VS2861 · 34rG VVS2674 · 32rD FL538 · 24rE VS2528 · 30rF VS1475 · 32rG VS1469 · 28rE IF369 · 37rF VVS1201 · 34rF VS2195 · 25rG VS2185 · 27rH VS1111 · 22rE FL61 · 23rF IF53 · 24rH VS252 · 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 2,431 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 544%, about A$1,268.

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.

Where to Buy 0.5ct Lab Grown Radiant Diamonds | Carat Hunter