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Carat Hunter · Where to buy diamonds

1.5ct · I · SI2 · Radiant · 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

1,456

Retailers carrying

49

Price range

NZ$3,787 to
NZ$23,939

Median confirmed price

NZ$8,780

Certificate mix:GIA 1,268 · HRD 51 · IGI 40

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.

  1. 1Carbon Sparkle128 in stock
    United States·GIA, HRD, IGI·21-day returns·Ships to New Zealand
    Terms read on the retailer’s own site, September 2, 2026
    Visit Carbon Sparkle
  2. 2NZ Jewellers128 in stock
    New Zealand·Founded 2006·GIA, HRD, IGI·30-day returns·Ships to New Zealand
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
  3. 3

    The Perfect Carat

    103 in stock
    US·GIA, HRD, IGI
    Terms not yet verified
  4. 4Aurelinne88 in stock
    United States·Founded 2021·GIA, HRD, IGI·Ships to New Zealand
    Terms not yet verified
    Visit Aurelinne
  8. 8Yorxs57 in stock
    Germany·Founded 2011·GIA, HRD, IGI
    Terms not yet verified
    Visit Yorxs
  10. 10Rare Carat52 in stock
    United States·Founded 2016·GIA, IGI·30-day returns·Ships to New Zealand
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
Show 39 more retailers
  2. 12B2C Jewels48 in stock
    United States·Founded 2004·GIA, HRD, IGI·30-day returns·Ships to New Zealand
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  4. 14Allurez42 in stock
    United States·Founded 2010·Ships to New Zealand
    Terms not yet verified
    Visit Allurez
  12. 22Jared18 in stock
    United States·Founded 1993·GIA
    Terms not yet verified
    Visit Jared
  16. 26Zales17 in stock
    United States·Founded 1924·GIA
    Terms not yet verified
    Visit Zales
  18. 28GemsNY15 in stock
    United States·Founded 1988·GIA·Ships to New Zealand
    Terms not yet verified
    Visit GemsNY
  19. 29

    GemTrove

    14 in stock
    AU·GIA, HRD
    Terms not yet verified
  39. 49ZCOVA1 in stock
    Malaysia·Founded 2015·GIA·Ships to New Zealand
    Terms not yet verified
    Visit ZCOVA

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 1,456 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 1.5ct natural radiant diamond, all grades

How pricing is spread at this spec

For the 317 diamonds at this spec with a recently confirmed price, each taken at its cheapest confirmed price, the distribution looks like this:

  • Lowest confirmed
    NZ$3,787
  • 10th percentile
    NZ$5,494
  • Median
    NZ$8,780
  • 75th percentile
    NZ$10,923
  • 90th percentile
    NZ$13,814
  • Highest confirmed
    NZ$23,939

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 NZ$5,494. Use the explorer to sort by price.

Sort by price

Best cut quality for the spec?

395 of 1,456 active listings carry Excellent or Ideal across cut, polish and symmetry.

View top-cut subset

GIA-graded only?

1,268 of 1,456 (87%) carry GIA. 47 retailers stock GIA at this spec.

Want None or Faint fluorescence?

1,378 of 1,456 are graded None or Faint at this spec.

Shopping from New Zealand?

25 of the 46 retailers with shipping details ship to New Zealand. 21 do not. 3 retailers have not published any shipping details.

What this spec means

  • Radiant: a rectangular brilliant cut that combines the emerald outline with round-style faceting.
  • I colour: near-colourless, with a faint warm tint just detectable in larger stones.
  • SI2 clarity: Slightly Included 2. Inclusions easy to see at 10x. May be visible to the unaided eye in some stones.
  • 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 1.5ct I SI2 radiant natural diamonds.

Compare Carbon Sparkle vs NZ Jewellers

Related specs

Slightly smaller carat

radiant-1-25ct-i-si2-natural

Slightly larger carat

radiant-2ct-i-si2-natural

One colour grade higher

radiant-1-5ct-h-si2-natural

One colour grade lower

radiant-1-5ct-j-si2-natural

One clarity grade higher

radiant-1-5ct-i-si1-natural

Same spec, lab grown

radiant-1-5ct-i-si2-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 1.5ct I SI2 Radiant Natural Diamonds | Carat Hunter