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Carat Hunter · Where to buy diamonds

Where to buy a 3ct lab-grown radiant diamond

Every retailer in our index stocking this size and shape, 57 of them, across 131,142 live listings.

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

The market at this size and shape

Active listings

131,142

Retailers carrying

57

Median active price

A$1,951

Grade combinations

30

Certificate mix:IGI 117,361 · GIA 10,407 · GCAL 1,795 · AGS 3

What it actually costs

Lower 10% A$945Median A$1,951Upper 10% A$7,065

Middle half sell between A$1,294 to A$3,428

Certificated stones with a live price only, 36,777 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

195%

Typical difference

A$2,636

Stones compared

19,286

Across 19,286 stones of this size and shape carried by more than one retailer, the dearest listing sits 195% above the cheapest for the identical certificated diamond, a typical gap of A$2,636. 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.

E VS117,560 · 45rE VVS215,877 · 46rF VVS214,648 · 45rD VS114,015 · 45rD VVS213,781 · 49rF VS19,639 · 41rD VVS19,219 · 39rD IF8,035 · 40rG VVS25,322 · 32rD FL4,651 · 28rG VS13,816 · 35rE VVS12,728 · 40rE VS22,611 · 38rD VS22,411 · 38rF VS21,708 · 37rH VS11,143 · 28rG VS2850 · 34rE IF800 · 38rF VVS1750 · 35rH VS2354 · 25rH VVS2300 · 27rF IF268 · 31rG VVS1196 · 32rE FL137 · 22rG IF129 · 20rI VS180 · 21rI VVS238 · 14rH VVS132 · 10rH IF22 · 16rI VS219 · 13r

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 19,286 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 195%, about A$2,636.

Can I see retailers for one exact grade?

Yes. Each of the 30 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.