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Carat Hunter · Where to buy diamonds

Where to buy a 0.5ct lab-grown round diamond

Every retailer in our index stocking this size and shape, 64 of them, across 365,873 live listings.

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

The market at this size and shape

Active listings

365,873

Retailers carrying

64

Median active price

£158

Grade combinations

33

Certificate mix:IGI 325,359 · GIA 5,726 · GCAL 879 · HRD 830 · AGS 4

What it actually costs

Lower 10% £84Median £158Upper 10% £321

Middle half sell between £118 to £205

Certificated stones with a live price only, 72,824 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

142%

Typical difference

£208

Stones compared

50,099

Across 50,099 stones of this size and shape carried by more than one retailer, the dearest listing sits 142% above the cheapest for the identical certificated diamond, a typical gap of £208. 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
  5. 15

    The Perfect Carat

    9,264 in stock
    US

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 VVS2116,461 · 59rD VS168,033 · 46rD VVS157,031 · 45rE VVS222,401 · 44rE VS116,785 · 40rD IF14,147 · 44rE VVS113,838 · 44rD VS212,529 · 41rD FL8,073 · 29rF VVS24,173 · 35rE VS23,837 · 34rF VVS13,202 · 35rE IF3,068 · 42rF VS13,015 · 36rG VVS22,204 · 31rG VVS11,946 · 30rH VS11,764 · 27rH VS21,543 · 18rH VVS21,243 · 28rF IF1,175 · 30rI VS21,150 · 24rG VS11,149 · 30rH VVS11,121 · 22rI VS11,084 · 24rF VS2971 · 27rG IF968 · 30rG VS2916 · 22rI VVS1750 · 23rI VVS2505 · 24rH IF370 · 24rI IF197 · 7rE FL152 · 24rF FL72 · 19r

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

  • Round: the most common cut, with the highest light return per carat.
  • 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 50,099 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 142%, about £208.

Can I see retailers for one exact grade?

Yes. Each of the 33 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.