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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 350,483 live listings.

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

The market at this size and shape

Active listings

350,483

Retailers carrying

64

Median active price

A$309

Grade combinations

33

Certificate mix:IGI 312,100 · GIA 5,752 · GCAL 858 · HRD 828 · AGS 4

What it actually costs

Lower 10% A$178Median A$309Upper 10% A$632

Middle half sell between A$231 to A$409

Certificated stones with a live price only, 71,905 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

156%

Typical difference

A$415

Stones compared

47,546

Across 47,546 stones of this size and shape carried by more than one retailer, the dearest listing sits 156% above the cheapest for the identical certificated diamond, a typical gap of A$415. 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.

2 of the 25 retailers ship to Australia. 23 do not.

Narrow it down by grade

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

D VVS2110,780 · 59rD VS165,350 · 46rD VVS154,874 · 45rE VVS221,793 · 44rE VS114,560 · 40rD IF13,771 · 43rE VVS113,317 · 44rD VS212,079 · 41rD FL7,721 · 28rF VVS24,088 · 35rE VS23,693 · 34rF VVS13,190 · 34rE IF3,010 · 41rF VS12,972 · 36rG VVS22,205 · 30rG VVS11,951 · 30rH VS11,766 · 26rH VS21,553 · 17rH VVS21,236 · 28rF IF1,175 · 30rG VS11,159 · 29rI VS21,130 · 23rH VVS11,128 · 21rI VS11,074 · 23rF VS2971 · 27rG IF969 · 29rG VS2928 · 22rI VVS1749 · 22rI VVS2502 · 23rH IF374 · 24rI IF201 · 7rE FL146 · 23rF FL68 · 18r

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 47,546 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 156%, about A$415.

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.