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Carat Hunter · Where to buy diamonds

1.25ct · K · IF · Marquise · Natural

Every retailer carrying this exact spec, from our latest listings.

Updated November 6, 2026 · Independent. Zero affiliate revenue.

Market at this spec

Active listings

13

Retailers carrying

13

Price range

£1,551 to
£3,035

Median confirmed price

£2,087

Certificate mix:IGI 10 · GIA 2

Range and median take each diamond at this spec at its cheapest recently confirmed price. They are cohort statistics, not per-retailer pricing claims.

Every retailer that stocks this spec

Ranked by active inventory count. Selection is mechanical, not editorial.

  3. 3Allurez1 in stock
    United States·Founded 2010·Ships to United Kingdom
    Terms not yet verified
    Visit Allurez
  4. 4B2C Jewels1 in stock
    United States·Founded 2004·IGI·30-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  10. 10NZ Jewellers1 in stock
    New Zealand·Founded 2006·IGI·30-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
Show 3 more retailers
  1. 11RockHer1 in stock
    United States·Founded 2016·IGI·Ships to United Kingdom
    Terms not yet verified
    Visit RockHer
  2. 12

    The Perfect Carat

    1 in stock
    US·IGI
    Terms not yet verified

Stock counts reflect current listings. 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.

Explore all 13 stones in this cohort

Stones at this spec now

Current examples carried by more than one retailer, so the comparison is real. Prices shown in USD.

See every 1.25ct natural marquise diamond, all grades

How pricing is spread at this spec

For the 5 diamonds at this spec with a recently confirmed price, each taken at its cheapest confirmed price, the distribution looks like this:

  • Lowest confirmed
    £1,551
  • 10th percentile
    £1,560
  • Median
    £2,087
  • 75th percentile
    £2,377
  • 90th percentile
    £2,772
  • Highest confirmed
    £3,035

Cohort distribution only. No retailer named adjacent to a dollar figure in this section.

How to pick

Lowest price floor for the spec?

The cheapest confirmed prices start around £1,560. Use the explorer to sort by price.

Sort by price

Want None or Faint fluorescence?

13 of 13 are graded None or Faint at this spec.

Shopping from United Kingdom?

10 of the 12 retailers with shipping details ship to United Kingdom. 2 do not. 1 retailer has not published any shipping details.

What this spec means

  • Marquise: a pointed-end ellipse that faces up large for its carat.
  • K colour: Faint tint. Noticeable warmth even face-up, particularly in white-metal settings.
  • IF clarity: internally flawless, with no internal imperfections and surface marks only.
  • Natural: mined diamonds with the certification, provenance and resale profile traditional buyers expect.

Compare the top retailers carrying this spec

Side-by-side facts for the two stores carrying the most 1.25ct K IF marquise natural diamonds.

Compare 77 Diamonds vs Adiamor

Related specs

Slightly smaller carat

marquise-1ct-k-if-natural

Slightly larger carat

marquise-1-5ct-k-if-natural

One colour grade higher

marquise-1-25ct-j-if-natural

One clarity grade higher

marquise-1-25ct-k-fl-natural

One clarity grade lower

marquise-1-25ct-k-vvs1-natural

Same spec, lab grown

marquise-1-25ct-k-if-lab

Frequently asked

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.

Why is one retailer cheaper for the same certificate?

Markup and overhead vary by retailer. The same physical diamond can list at very different prices across stores. See our cross-retailer analysis for the structural reasons.

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 1.25ct K IF Marquise Natural Diamonds | Carat Hunter