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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, 45 of them, across 28,683 live listings.

Updated September 14, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

28,683

Retailers carrying

45

Median active price

HK$2,108

Grade combinations

26

Certificate mix:IGI 27,984 · GCAL 127 · GIA 53 · HRD 3

What it actually costs

Lower 10% HK$792Median HK$2,108Upper 10% HK$5,085

Middle half sell between HK$1,400 to HK$3,683

Certificated stones with a live price only, 6,210 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

239%

Typical difference

HK$3,429

Stones compared

3,322

Across 3,322 stones of this size and shape carried by more than one retailer, the dearest listing sits 239% above the cheapest for the identical certificated diamond, a typical gap of HK$3,429. 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.

Show 15 more retailers

Stock counts are updated daily. Founded, return window and shipping details are retailer-provided and were last verified September 2, 2026.

Narrow it down by grade

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

D VVS17,842 · 36rD VVS27,090 · 39rD VS13,382 · 32rE VVS22,121 · 34rD IF1,845 · 31rE VS11,583 · 34rE VVS11,298 · 33rD VS2599 · 27rF VVS2594 · 29rE VS2328 · 21rG VVS2317 · 27rF VS1315 · 28rG VS1286 · 24rE IF236 · 30rD FL163 · 18rF VVS1132 · 27rF VS2130 · 19rG VS2121 · 19rH VS178 · 15rE FL42 · 17rG VVS137 · 18rH VVS229 · 17rF IF29 · 17rH VS226 · 16rH VVS113 · 6rI VS212 · 9r

Stones at this spec now

Live 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 60% to 80% less than a comparable natural cohort.

Frequently asked

How much do retailers differ on the same diamond?

Across 3,322 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 239%, about HK$3,429.

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?

Live listings refresh daily. 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