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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, 50 of them, across 28,163 current listings.

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

The market at this size and shape

Active listings

28,163

Retailers carrying

50

Median confirmed price

HK$1,784

Grade combinations

37

Certificate mix:IGI 25,775 · GCAL 125 · GIA 94

What it actually costs

Half of these diamonds are listed between HK$1,066 and HK$2,911 (as of November 6, 2026).

Lower 10% HK$956Median HK$1,784Upper 10% HK$3,651

Middle half listed between HK$1,066 to HK$2,911

Certificated stones with a recently confirmed price only, 2,407 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.

  1. 1Rare Carat2,060 in stock
    United States·Founded 2016·GCAL, GIA, IGI·30-day returns·Ships to Hong Kong
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  2. 2Aurelinne1,912 in stock
    United States·Founded 2021·GCAL, GIA, IGI·Ships to Hong Kong
    Terms not yet verified
    Visit Aurelinne
  3. 3Carbon Sparkle1,912 in stock
    United States·GCAL, GIA, IGI·21-day returns·Ships to Hong Kong
    Terms read on the retailer’s own site, September 2, 2026
    Visit Carbon Sparkle
  4. 4NZ Jewellers1,829 in stock
    New Zealand·Founded 2006·GCAL, GIA, IGI·30-day returns·Ships to Hong Kong
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
  6. 6

    The Perfect Carat

    1,553 in stock
    US·GCAL, GIA, IGI
    Terms not yet verified
Show 40 more retailers
  1. 11B2C Jewels1,006 in stock
    United States·Founded 2004·GIA, IGI·30-day returns·Ships to Hong Kong
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  3. 13Yorxs904 in stock
    Germany·Founded 2011·GIA, IGI
    Terms not yet verified
    Visit Yorxs
  4. 14Cape Diamonds834 in stock
    South Africa·Founded 2005·GIA, IGI·7-day returns·Ships to Hong Kong
    Terms read on the retailer’s own site, June 15, 2026
    Visit Cape Diamonds
  20. 30GemsNY292 in stock
    United States·Founded 1988·IGI·Ships to Hong Kong
    Terms not yet verified
    Visit GemsNY
  24. 34Allurez217 in stock
    United States·Founded 2010·IGI·Ships to Hong Kong
    Terms not yet verified
    Visit Allurez
  30. 40Zales28 in stock
    United States·Founded 1924·GCAL, IGI
    Terms not yet verified
    Visit Zales
  32. 42Jared19 in stock
    United States·Founded 1993·GCAL, IGI
    Terms not yet verified
    Visit Jared
  39. 49RockHer1 in stock
    United States·Founded 2016·GIA·Ships to Hong Kong
    Terms not yet verified
    Visit RockHer
  40. 50ZCOVA1 in stock
    Malaysia·Founded 2015·IGI·Ships to Hong Kong
    Terms not yet verified
    Visit ZCOVA

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.

27 of the 48 retailers with shipping details ship to Hong Kong. 21 do not. 2 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 VVS19,020 · 43rD VVS24,327 · 42rD VS11,887 · 45rE VVS11,676 · 41rE VVS21,676 · 38rD IF1,574 · 39rE VS11,425 · 43rG VS1599 · 28rF VVS2559 · 36rF VS1558 · 28rF VS2494 · 26rD VS2443 · 37rD FL442 · 30rH VS1417 · 24rE VS2394 · 28rH VS2387 · 19rE IF318 · 36rG VVS2281 · 26rG VS2267 · 21rH SI1185 · 15rH VVS2175 · 27rF VVS1161 · 34rE SI1145 · 23rD SI199 · 25rE FL97 · 26rG SI193 · 16rF SI190 · 19rI VS168 · 14rI SI163 · 13rI VS246 · 15rF SI235 · 19rI SI231 · 11rH SI227 · 11rI VVS227 · 14rE SI220 · 16rJ VS115 · 15rG SI214 · 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

  • 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?

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 37 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.