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Carat Hunter · Where to buy diamonds

Where to buy a 1.25ct lab-grown marquise diamond

Every retailer in our index stocking this size and shape, 59 of them, across 36,759 current listings.

Updated October 30, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

36,759

Retailers carrying

59

Median confirmed price

A$688

Grade combinations

25

Certificate mix:IGI 34,772 · GIA 525 · GCAL 480 · HRD 1

What it actually costs

Half of these diamonds are listed between A$420 and A$1,141 (as of October 30, 2026).

Lower 10% A$322Median A$688Upper 10% A$1,836

Middle half listed between A$420 to A$1,141

Certificated stones with a recently confirmed price only, 3,163 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

305%

Typical difference

A$1,526

Stones compared

2,238

Across 2,238 stones of this size and shape carried by more than one retailer, the dearest listing sits 305% above the cheapest for the identical certificated diamond, a typical gap of A$1,526. 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.

  1. 1Rare Carat2,833 in stock
    United States·Founded 2016·30-day returns·Ships to Australia
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  5. 5Adiamor1,530 in stock
    United States·Founded 1999·30-day returns
    Terms not yet verified
    Visit Adiamor
  8. 8B2C Jewels1,467 in stock
    United States·Founded 2004·30-day returns·Ships to Australia
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
Show 15 more retailers
  1. 11NZ Jewellers1,384 in stock
    New Zealand·Founded 2006·30-day returns·Ships to Australia
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
  3. 13Aurelinne1,187 in stock
    United States·Founded 2021·30-day returns·Ships to Australia
    Terms not yet verified
    Visit Aurelinne
  4. 14

    The Perfect Carat

    1,161 in stock
    US
    Terms not yet verified
  6. 16Cape Diamonds1,091 in stock
    South Africa·Founded 2005·7-day returns·Ships to Australia
    Terms read on the retailer’s own site, June 15, 2026
    Visit Cape Diamonds
  7. 17Yorxs1,020 in stock
    Germany·Founded 2011·100-day returns
    Terms not yet verified
    Visit Yorxs

Stock counts are updated daily. Founded and shipping details come from public sources. Return terms are our summary of each retailer's own policy page, dated per retailer above. Retailers change their terms, so check the retailer's own returns and shipping pages before you buy.

17 of the 25 retailers ship to Australia. 8 do not.

Narrow it down by grade

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

E VVS25,318 · 55rD VVS24,953 · 55rD VVS14,647 · 52rD IF4,118 · 47rD FL3,643 · 39rE VS13,295 · 52rD VS12,830 · 53rF VVS21,799 · 52rE VVS11,760 · 52rF VS11,058 · 49rE VS2765 · 41rD VS2408 · 43rF VVS1407 · 39rG VS1354 · 33rF VS2334 · 34rE IF314 · 37rG VVS2210 · 34rE FL205 · 33rG VVS171 · 22rG VS268 · 23rH VS165 · 11rF IF39 · 25rH VVS234 · 7rH VS233 · 5rH VVS127 · 3r

Stones at this spec now

Current 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 at least 90% less than a comparable natural cohort from 1 carat up.

Frequently asked

How much do retailers differ on the same diamond?

Across 2,238 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 305%, about A$1,526.

Can I see retailers for one exact grade?

Yes. Each of the 25 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?

Listings refresh as we re-read each retailer, most of them every day. 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.