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Carat Hunter · Where to buy diamonds

Where to buy a 0.5ct lab-grown marquise diamond

Every retailer in our index stocking this size and shape, 51 of them, across 26,552 live listings.

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

The market at this size and shape

Active listings

26,552

Retailers carrying

51

Median active price

NZ$491

Grade combinations

26

Certificate mix:IGI 24,829 · GIA 163 · GCAL 153

What it actually costs

Lower 10% NZ$284Median NZ$491Upper 10% NZ$1,009

Middle half sell between NZ$324 to NZ$776

Certificated stones with a live price only, 6,215 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

165%

Typical difference

NZ$601

Stones compared

2,987

Across 2,987 stones of this size and shape carried by more than one retailer, the dearest listing sits 165% above the cheapest for the identical certificated diamond, a typical gap of NZ$601. 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
  15. 25

    MOH London

    228 in stock
    United Kingdom

Stock counts are updated daily. Founded, return window and shipping details are retailer-provided and were last verified September 2, 2026.

1 of the 25 retailers ship to New Zealand. 24 do not.

Narrow it down by grade

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

D VVS28,022 · 46rD VVS17,094 · 36rD VS12,785 · 41rE VVS11,441 · 34rE VVS21,418 · 35rE VS11,247 · 39rD IF895 · 33rF VVS2473 · 31rD VS2455 · 34rF VS1403 · 27rG VS1324 · 25rF VS2264 · 22rE VS2245 · 27rE IF223 · 33rD FL205 · 21rH VS1203 · 20rG VVS2186 · 21rH VS2163 · 15rF VVS1147 · 26rG VS298 · 16rH VVS283 · 19rE FL42 · 18rI VS142 · 11rI VS232 · 12rI VVS219 · 10rG VVS115 · 12r

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.
  • 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 2,987 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 165%, about NZ$601.

Can I see retailers for one exact grade?

Yes. Each of the 26 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 0.5ct Lab Grown Marquise Diamonds | Carat Hunter