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Carat Hunter · Where to buy diamonds

Where to buy a 0.75ct lab-grown radiant diamond

Every retailer in our index stocking this size and shape, 55 of them, across 20,834 live listings.

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

The market at this size and shape

Active listings

20,834

Retailers carrying

55

Median active price

A$577

Grade combinations

27

Certificate mix:IGI 20,280 · GCAL 67 · GIA 52

What it actually costs

Lower 10% A$202Median A$577Upper 10% A$1,138

Middle half sell between A$354 to A$782

Certificated stones with a live price only, 4,866 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

215%

Typical difference

A$763

Stones compared

2,515

Across 2,515 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$763. 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 VVS24,147 · 45rD VS13,517 · 37rD VVS12,515 · 37rE VS12,108 · 33rE VVS21,763 · 33rE VVS11,234 · 35rD IF813 · 33rF VS1760 · 30rF VVS2744 · 33rE VS2555 · 30rD VS2452 · 26rF VS2420 · 27rG VS1342 · 27rG VVS2279 · 33rE IF221 · 32rG VS2206 · 28rF VVS1178 · 33rH VS1145 · 31rH VS2110 · 26rH VVS273 · 21rD FL60 · 20rF IF47 · 26rI VS135 · 16rI VVS235 · 17rG VVS121 · 16rH VVS119 · 11rI VS215 · 5r

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 2,515 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 215%, about A$763.

Can I see retailers for one exact grade?

Yes. Each of the 27 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.