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Carat Hunter · Where to buy diamonds

0.5ct · H · 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

11,813

Retailers carrying

54

Price range

£166 to
£1,740

Median confirmed price

£573

Certificate mix:GIA 9,357 · IGI 1,307 · HRD 166

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.

  2. 2Rare Carat972 in stock
    United States·Founded 2016·GIA, HRD, IGI·30-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  3. 3Yorxs806 in stock
    Germany·Founded 2011·GIA, HRD, IGI
    Terms not yet verified
    Visit Yorxs
  5. 5NZ Jewellers705 in stock
    New Zealand·Founded 2006·GIA, HRD, IGI·30-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
  6. 6Allurez629 in stock
    United States·Founded 2010·GIA, IGI·Ships to United Kingdom
    Terms not yet verified
    Visit Allurez
  8. 8Aurelinne501 in stock
    United States·Founded 2021·GIA, HRD, IGI·Ships to United Kingdom
    Terms not yet verified
    Visit Aurelinne
  9. 9Carbon Sparkle491 in stock
    United States·GIA, HRD, IGI·21-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, September 2, 2026
    Visit Carbon Sparkle
Show 44 more retailers
  2. 12

    The Perfect Carat

    341 in stock
    US·GIA, HRD, IGI
    Terms not yet verified
  4. 14B2C Jewels257 in stock
    United States·Founded 2004·GIA, HRD, IGI·30-day returns·Ships to United Kingdom
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  11. 21Ritani174 in stock
    United States·Founded 1999·GIA, IGI
    Terms not yet verified
    Visit Ritani
  34. 44Jared11 in stock
    United States·Founded 1993·GIA
    Terms not yet verified
    Visit Jared
  36. 46Zales11 in stock
    United States·Founded 1924·GIA
    Terms not yet verified
    Visit Zales
  39. 49ZCOVA2 in stock
    Malaysia·Founded 2015·GIA·Ships to United Kingdom
    Terms not yet verified
    Visit ZCOVA
  41. 51

    GemTrove

    1 in stock
    AU·GIA
    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 11,813 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 4,232 diamonds at this spec with a recently confirmed price, each taken at its cheapest confirmed price, the distribution looks like this:

  • Lowest confirmed
    £166
  • 10th percentile
    £328
  • Median
    £573
  • 75th percentile
    £735
  • 90th percentile
    £954
  • Highest confirmed
    £1,740

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 £328. Use the explorer to sort by price.

Sort by price

Best cut quality for the spec?

7,623 of 11,813 active listings carry Excellent or Ideal across cut, polish and symmetry.

View top-cut subset

GIA-graded only?

9,357 of 11,813 (79%) carry GIA. 50 retailers stock GIA at this spec.

Want None or Faint fluorescence?

10,872 of 11,813 are graded None or Faint at this spec.

Shopping from United Kingdom?

33 of the 52 retailers with shipping details ship to United Kingdom. 19 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.
  • H colour: near-colourless, with a slight warm tint visible only against a colourless reference.
  • 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 H SI2 round natural diamonds.

Compare Diamond Quarter vs Rare Carat

Related specs

Slightly larger carat

round-0-75ct-h-si2-natural

One colour grade higher

round-0-5ct-g-si2-natural

One colour grade lower

round-0-5ct-i-si2-natural

One clarity grade higher

round-0-5ct-h-si1-natural

Same spec, lab grown

round-0-5ct-h-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 H SI2 Round Natural Diamonds | Carat Hunter