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Carat Hunter · Where to buy diamonds

1ct · K · SI1 · Heart · 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

662

Retailers carrying

38

Price range

$866 to
$4,702

Median confirmed price

$1,353

Certificate mix:GIA 542 · IGI 58 · HRD 42

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. 3NZ Jewellers45 in stock
    New Zealand·Founded 2006·GIA, HRD, IGI·30-day returns·Ships to United States
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
  4. 4Carbon Sparkle36 in stock
    United States·GIA, HRD, IGI·21-day returns·Ships to United States
    Terms read on the retailer’s own site, September 2, 2026
    Visit Carbon Sparkle
  7. 7Yorxs30 in stock
    Germany·Founded 2011·GIA, HRD, IGI
    Terms not yet verified
    Visit Yorxs
  9. 9Cape Diamonds29 in stock
    South Africa·Founded 2005·GIA, IGI·7-day returns·Ships to United States
    Terms read on the retailer’s own site, June 15, 2026
    Visit Cape Diamonds
Show 28 more retailers
  1. 11B2C Jewels25 in stock
    United States·Founded 2004·GIA, HRD, IGI·30-day returns·Ships to United States
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  3. 13RockHer25 in stock
    United States·Founded 2016·GIA, IGI·Ships to United States
    Terms not yet verified
    Visit RockHer
  4. 14

    The Perfect Carat

    25 in stock
    US·GIA, HRD, IGI·Ships to United States
    Terms not yet verified
  8. 18Allurez16 in stock
    United States·Founded 2010·Ships to United States
    Terms not yet verified
    Visit Allurez
  11. 21Ritani15 in stock
    United States·Founded 1999·GIA·Ships to United States
    Terms not yet verified
    Visit Ritani
  12. 22

    GemTrove

    12 in stock
    AU·GIA
    Terms not yet verified
  15. 25Adiamor6 in stock
    United States·Founded 1999·GIA·Ships to United States
    Terms not yet verified
    Visit Adiamor
  16. 26ZCOVA6 in stock
    Malaysia·Founded 2015·GIA·Ships to United States
    Terms not yet verified
    Visit ZCOVA
  28. 38Rare Carat1 in stock
    United States·Founded 2016·GIA·30-day returns·Ships to United States
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat

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 662 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 1ct natural heart diamond, all grades

How pricing is spread at this spec

For the 141 diamonds at this spec with a recently confirmed price, each taken at its cheapest confirmed price, the distribution looks like this:

  • Lowest confirmed
    $866
  • 10th percentile
    $1,028
  • Median
    $1,353
  • 75th percentile
    $2,272
  • 90th percentile
    $2,927
  • Highest confirmed
    $4,702

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 $1,028. Use the explorer to sort by price.

Sort by price

Best cut quality for the spec?

173 of 662 active listings carry Excellent or Ideal across cut, polish and symmetry.

View top-cut subset

GIA-graded only?

542 of 662 (82%) carry GIA. 36 retailers stock GIA at this spec.

Want None or Faint fluorescence?

577 of 662 are graded None or Faint at this spec.

Shopping from United States?

32 of the 36 retailers with shipping details ship to United States. 4 do not. 2 retailers have not published any shipping details.

What this spec means

  • Heart: a brilliant cut with a cleft and a pointed tip, classic and recognizable.
  • K color: Faint tint. Noticeable warmth even face-up, particularly in white-metal settings.
  • SI1 clarity: Slightly Included 1. Inclusions noticeable at 10x. Often still eye-clean depending on placement.
  • 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 1ct K SI1 heart natural diamonds.

Compare 77 Diamonds vs MOH London

Related specs

Slightly smaller carat

heart-0-75ct-k-si1-natural

Slightly larger carat

heart-1-25ct-k-si1-natural

One colour grade higher

heart-1ct-j-si1-natural

One clarity grade higher

heart-1ct-k-vs2-natural

One clarity grade lower

heart-1ct-k-si2-natural

Same spec, lab grown

heart-1ct-k-si1-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.