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Carat Hunter · Where to buy diamonds

Where to buy a 0.5ct lab-grown marquise diamond

Every retailer in our index stocking this size and shape, 49 of them, across 28,514 current listings.

Updated November 2, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

28,514

Retailers carrying

49

Median confirmed price

A$334

Grade combinations

26

Certificate mix:IGI 25,807 · GCAL 120 · GIA 44

What it actually costs

Half of these diamonds are listed between A$194 and A$526 (as of November 2, 2026).

Lower 10% A$174Median A$334Upper 10% A$664

Middle half listed between A$194 to A$526

Certificated stones with a recently confirmed price only, 2,470 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

418%

Typical difference

A$1,044

Stones compared

1,827

Across 1,827 stones of this size and shape carried by more than one retailer, the dearest listing sits 418% above the cheapest for the identical certificated diamond, a typical gap of A$1,044. 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. 1Aurelinne2,068 in stock
    United States·Founded 2021·30-day returns·Ships to Australia
    Terms not yet verified
    Visit Aurelinne
  2. 2Rare Carat2,039 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
  4. 4NZ Jewellers1,682 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

    1,418 in stock
    US
    Terms not yet verified
Show 15 more retailers
  1. 11B2C Jewels1,072 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
  3. 13Cape Diamonds854 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
  5. 15Allurez732 in stock
    United States·Founded 2010·30-day returns·Ships to Australia
    Terms not yet verified
    Visit Allurez
  10. 20Yorxs560 in stock
    Germany·Founded 2011·100-day returns
    Terms not yet verified
    Visit Yorxs

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.

18 of the 25 retailers ship to Australia. 7 do not.

Narrow it down by grade

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

D VVS19,070 · 43rD VVS25,219 · 43rD VS12,198 · 44rE VVS11,694 · 41rE VVS21,631 · 39rD IF1,535 · 39rE VS11,487 · 43rG VS1604 · 28rF VS1562 · 29rF VVS2553 · 34rF VS2489 · 25rD VS2452 · 38rD FL440 · 30rH VS1419 · 24rH VS2384 · 19rE VS2334 · 28rE IF316 · 36rG VVS2281 · 26rG VS2267 · 21rF VVS1173 · 35rH VVS2170 · 26rE FL93 · 26rI VS168 · 14rI VS238 · 14rI VVS219 · 12rF IF11 · 11r

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

  • Marquise: a pointed-end ellipse that faces up large for its 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?

Across 1,827 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 418%, about A$1,044.

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.