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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, 42 of them, across 14,929 current listings.

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

The market at this size and shape

Active listings

14,929

Retailers carrying

42

Median confirmed price

HK$1,969

Grade combinations

23

Certificate mix:IGI 14,513 · GCAL 5 · GIA 4

What it actually costs

Half of these diamonds are listed between HK$1,373 and HK$3,110 (as of November 4, 2026).

Lower 10% HK$1,122Median HK$1,969Upper 10% HK$4,216

Middle half listed between HK$1,373 to HK$3,110

Certificated stones with a recently confirmed price only, 1,882 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

348%

Typical difference

HK$5,844

Stones compared

1,488

Across 1,488 stones of this size and shape carried by more than one retailer, the dearest listing sits 348% above the cheapest for the identical certificated diamond, a typical gap of HK$5,844. 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.

  5. 5Rare Carat930 in stock
    United States·Founded 2016·30-day returns·Ships to Hong Kong
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  6. 6Yorxs904 in stock
    Germany·Founded 2011·100-day returns
    Terms not yet verified
    Visit Yorxs
  7. 7B2C Jewels825 in stock
    United States·Founded 2004·30-day returns·Ships to Hong Kong
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  10. 10Cape Diamonds498 in stock
    South Africa·Founded 2005·7-day returns·Ships to Hong Kong
    Terms read on the retailer’s own site, June 15, 2026
    Visit Cape Diamonds
Show 15 more retailers
  10. 20GemsNY256 in stock
    United States·Founded 1988·30-day returns·Ships to Hong Kong
    Terms not yet verified
    Visit GemsNY
  15. 25Allurez208 in stock
    United States·Founded 2010·30-day returns·Ships to Hong Kong
    Terms not yet verified
    Visit Allurez

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.

13 of the 25 retailers ship to Hong Kong. 12 do not.

Narrow it down by grade

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

D VVS24,719 · 39rD VS12,577 · 37rD VVS12,125 · 38rE VVS21,366 · 35rE VS11,222 · 33rE VVS1690 · 39rD VS2653 · 30rF VVS2330 · 31rD IF304 · 33rE VS2281 · 25rE IF152 · 32rF VS1151 · 24rG VVS271 · 24rF VS259 · 22rF VVS146 · 28rG VS132 · 21rI VS128 · 14rF IF26 · 23rH VS224 · 16rG VVS122 · 16rG VS215 · 10rD FL13 · 13rH 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?

Across 1,488 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 348%, about HK$5,844.

Can I see retailers for one exact grade?

Yes. Each of the 23 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.