CaratHunter
Plans

Carat Hunter · Where to buy diamonds

Where to buy a 3ct natural cushion diamond

Every retailer in our index stocking this size and shape, 63 of them, across 7,621 live listings.

Updated September 18, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

7,621

Retailers carrying

63

Median active price

£23,310

Grade combinations

30

Certificate mix:GIA 6,663 · HRD 144 · IGI 72 · AGS 2

What it actually costs

Lower 10% £9,270Median £23,310Upper 10% £39,203

Middle half sell between £15,066 to £32,164

Certificated stones with a live price only, 3,698 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

28%

Typical difference

£5,861

Stones compared

2,179

Across 2,179 stones of this size and shape carried by more than one retailer, the dearest listing sits 28% above the cheapest for the identical certificated diamond, a typical gap of £5,861. 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 June 15, 2026.

6 of the 25 retailers ship to United Kingdom. 19 do not.

Narrow it down by grade

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

H VS2798 · 46rI VS2585 · 41rI VS1535 · 45rG VS2526 · 44rG VS1484 · 51rH VS1477 · 47rE VS2408 · 44rF VS2394 · 45rF VS1378 · 46rD VS1373 · 45rE VS1372 · 43rD VS2367 · 48rG VVS2345 · 47rI VVS2231 · 37rG VVS1158 · 36rH VVS1146 · 35rH VVS2146 · 33rF VVS2127 · 40rF VVS1108 · 36rE VVS2100 · 38rD VVS296 · 35rI VVS189 · 25rD IF87 · 29rD VVS172 · 30rE VVS150 · 25rD FL48 · 14rE IF37 · 28rG IF30 · 20rH IF29 · 19rF IF19 · 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

  • Cushion: a softened-corner square or rectangle with a vintage feel.
  • Natural: mined diamonds with the certification, provenance and resale profile traditional buyers expect.

Frequently asked

How much do retailers differ on the same diamond?

Across 2,179 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 28%, about £5,861.

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.

Where to Buy 3ct Natural Cushion Diamonds | Carat Hunter