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Carat Hunter · Where to buy diamonds

Where to buy a 3ct natural marquise diamond

Every retailer in our index stocking this size and shape, 59 of them, across 1,605 live listings.

Updated September 20, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

1,605

Retailers carrying

59

Median active price

A$51,372

Grade combinations

27

Certificate mix:GIA 1,284 · IGI 163 · HRD 28

What it actually costs

Lower 10% A$23,670Median A$51,372Upper 10% A$84,585

Middle half sell between A$32,433 to A$68,490

Certificated stones with a live price only, 654 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

49%

Typical difference

A$20,736

Stones compared

467

Across 467 stones of this size and shape carried by more than one retailer, the dearest listing sits 49% above the cheapest for the identical certificated diamond, a typical gap of A$20,736. 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.

  6. 6

    MOH London

    66 in stock
    United Kingdom
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 VS1115 · 40rD VS2101 · 39rI VS195 · 27rE VS193 · 44rH VS291 · 33rI VS288 · 26rF VS288 · 38rI VVS186 · 34rH VVS171 · 38rE VS270 · 37rG VVS166 · 35rG VS266 · 32rI VVS265 · 30rD FL54 · 25rD VVS152 · 32rF VVS146 · 26rD IF45 · 22rF VS145 · 22rG VS144 · 25rF IF42 · 28rH IF34 · 17rH VS132 · 17rG IF22 · 20rF VVS221 · 15rE IF21 · 13rH VVS213 · 6rD VVS210 · 10r

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

  • Marquise: a pointed-end ellipse that faces up large for its carat.
  • 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 467 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 49%, about A$20,736.

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.

Where to Buy 3ct Natural Marquise Diamonds | Carat Hunter