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Carat Hunter · Where to buy diamonds

Where to buy a 1.5ct lab-grown radiant diamond

Every retailer in our index stocking this size and shape, 60 of them, across 76,948 live listings.

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

The market at this size and shape

Active listings

76,948

Retailers carrying

60

Median active price

A$783

Grade combinations

29

Certificate mix:IGI 70,283 · GIA 4,498 · GCAL 660 · HRD 1

What it actually costs

Lower 10% A$326Median A$783Upper 10% A$3,033

Middle half sell between A$581 to A$2,031

Certificated stones with a live price only, 19,901 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

215%

Typical difference

A$1,414

Stones compared

10,851

Across 10,851 stones of this size and shape carried by more than one retailer, the dearest listing sits 215% above the cheapest for the identical certificated diamond, a typical gap of A$1,414. 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 VVS212,664 · 53rE VVS29,671 · 49rD VS19,564 · 51rD VVS19,111 · 47rE VS17,017 · 48rE VVS14,021 · 44rD IF3,502 · 39rF VVS23,474 · 45rF VS13,371 · 42rG VS12,358 · 36rE VS21,707 · 35rD FL1,658 · 28rD VS21,499 · 37rG VVS21,284 · 38rE IF963 · 37rF VVS1938 · 38rG VS2866 · 32rF VS2850 · 35rH VS1782 · 32rH VVS2448 · 32rH VS2239 · 29rE FL236 · 25rF IF180 · 30rG VVS1134 · 29rI VS197 · 21rG IF94 · 22rI VVS293 · 19rI VS267 · 18rH IF31 · 20r

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 10,851 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 215%, about A$1,414.

Can I see retailers for one exact grade?

Yes. Each of the 29 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.