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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 130,059 live listings.

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

The market at this size and shape

Active listings

130,059

Retailers carrying

57

Median active price

CA$1,718

Grade combinations

30

Certificate mix:IGI 116,589 · GIA 10,152 · GCAL 1,737 · AGS 3

What it actually costs

Lower 10% CA$824Median CA$1,718Upper 10% CA$6,215

Middle half sell between CA$1,128 to CA$3,015

Certificated stones with a live price only, 36,695 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

196%

Typical difference

CA$2,294

Stones compared

19,251

Across 19,251 stones of this size and shape carried by more than one retailer, the dearest listing sits 196% above the cheapest for the identical certificated diamond, a typical gap of CA$2,294. 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.

3 of the 25 retailers ship to Canada. 22 do not.

Narrow it down by grade

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

E VS117,578 · 44rE VVS215,900 · 45rF VVS214,674 · 44rD VS113,981 · 44rD VVS213,658 · 49rF VS19,625 · 41rD VVS18,969 · 39rD IF7,701 · 39rG VVS25,330 · 32rD FL4,361 · 27rG VS13,793 · 34rE VVS12,687 · 39rE VS22,593 · 37rD VS22,405 · 37rF VS21,731 · 36rH VS11,137 · 27rG VS2846 · 33rE IF783 · 37rF VVS1745 · 34rH VS2354 · 25rH VVS2297 · 26rF IF264 · 30rG VVS1197 · 32rG IF129 · 20rE FL128 · 21rI VS179 · 21rI VVS238 · 14rH VVS132 · 10rH IF21 · 15rI VS220 · 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 19,251 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 196%, about CA$2,294.

Can I see retailers for one exact grade?

Yes. Each of the 30 color 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.