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Carat Hunter · Where to buy diamonds

0.5ct · D · SI2 · Round · 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

14,636

Retailers carrying

56

Price range

$259 to
$2,625

Median confirmed price

$821

Certificate mix:GIA 11,771 · IGI 1,172 · HRD 1,059 · AGS 5

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 Jewellers1,053 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. 4Rare Carat908 in stock
    United States·Founded 2016·GIA, HRD, IGI·30-day returns·Ships to United States
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  6. 6Carbon Sparkle862 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. 7Aurelinne841 in stock
    United States·Founded 2021·GIA, HRD, IGI·Ships to United States
    Terms not yet verified
    Visit Aurelinne
  8. 8Yorxs787 in stock
    Germany·Founded 2011·GIA, HRD, IGI
    Terms not yet verified
    Visit Yorxs
  10. 10

    The Perfect Carat

    566 in stock
    US·GIA, HRD, IGI·Ships to United States
    Terms not yet verified
Show 46 more retailers
  1. 11Allurez452 in stock
    United States·Founded 2010·GIA·Ships to United States
    Terms not yet verified
    Visit Allurez
  5. 15B2C Jewels370 in stock
    United States·Founded 2004·AGS, GIA, HRD, IGI·30-day returns·Ships to United States
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  13. 23Ritani188 in stock
    United States·Founded 1999·GIA, IGI·Ships to United States
    Terms not yet verified
    Visit Ritani
  17. 27Adiamor111 in stock
    United States·Founded 1999·AGS, GIA·Ships to United States
    Terms not yet verified
    Visit Adiamor
  25. 35ZCOVA42 in stock
    Malaysia·Founded 2015·GIA·Ships to United States
    Terms not yet verified
    Visit ZCOVA
  28. 38Jared32 in stock
    United States·Founded 1993·GIA·Ships to United States
    Terms not yet verified
    Visit Jared
  31. 41Zales32 in stock
    United States·Founded 1924·GIA·Ships to United States
    Terms not yet verified
    Visit Zales
  39. 49

    GemTrove

    5 in stock
    AU·GIA
    Terms not yet verified
  40. 50Shane Co5 in stock
    United States·Founded 1971·GIA·Ships to United States
    Terms not yet verified
    Visit Shane Co
  45. 55RDI Diamonds2 in stock
    United States·Founded 1992·GIA·Ships to United States
    Terms read on the retailer’s own site, June 15, 2026
    Visit RDI Diamonds

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 14,636 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 0.5ct natural round diamond, all grades

How pricing is spread at this spec

For the 4,425 diamonds at this spec with a recently confirmed price, each taken at its cheapest confirmed price, the distribution looks like this:

  • Lowest confirmed
    $259
  • 10th percentile
    $502
  • Median
    $821
  • 75th percentile
    $1,085
  • 90th percentile
    $1,429
  • Highest confirmed
    $2,625

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 $502. Use the explorer to sort by price.

Sort by price

Best cut quality for the spec?

7,897 of 14,636 active listings carry Excellent or Ideal across cut, polish and symmetry.

View top-cut subset

GIA-graded only?

11,771 of 14,636 (80%) carry GIA. 55 retailers stock GIA at this spec.

Want None or Faint fluorescence?

12,255 of 14,636 are graded None or Faint at this spec.

Shopping from United States?

44 of the 54 retailers with shipping details ship to United States. 10 do not. 2 retailers have not published any shipping details.

What this spec means

  • Round: the most common cut, with the highest light return per carat.
  • D color: absolutely colorless, the top grade.
  • 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 0.5ct D SI2 round natural diamonds.

Compare Diamond Quarter vs Fonder Diamond

Related specs

Slightly larger carat

round-0-75ct-d-si2-natural

One colour grade lower

round-0-5ct-e-si2-natural

One clarity grade higher

round-0-5ct-d-si1-natural

Same spec, lab grown

round-0-5ct-d-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 0.5ct D SI2 Round Natural Diamonds | Carat Hunter