Where to buy a 1.5ct natural radiant diamond

Half of these diamonds are listed between $4,130 and $8,634 (as of November 6, 2026).

Certificated stones with a recently confirmed price only, 3,899 of them. Each contributes its cheapest confirmed price.

As of November 6, 2026, the same certified diamond typically costs 44% more at a typical retailer than at the cheapest for lab-grown stones, and 20% more for natural ones (the median across stones listed by two or more retailers). Comparing shows you the cheapest of the retailers listing the same stone.

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

1. 1NZ Jewellers2,563 in stock

   New Zealand·Founded 2006·EGL, GIA, HRD, IGI·30-day returns·Ships to United States

   Terms read on the retailer’s own site, October 19, 2026

   Visit NZ Jewellers
2. 2Carbon Sparkle2,363 in stock

   United States·EGL, GIA, GSI, HRD·21-day returns·Ships to United States

   Terms read on the retailer’s own site, September 2, 2026

   Visit Carbon Sparkle
3. 3

   The Perfect Carat

   1,955 in stock

   US·EGL, GIA, HRD, IGI·Ships to United States

   Terms not yet verified
4. 4Aurelinne1,886 in stock

   United States·Founded 2021·EGL, GIA, HRD, IGI·Ships to United States

   Terms not yet verified

   Visit Aurelinne
5. 5MOH London1,583 in stock

   United Kingdom·EGL, GIA, HRD, IGI

   Terms not yet verified

   Visit MOH London
6. 677 Diamonds1,564 in stock

   United Kingdom·Founded 2005·GIA, HRD, IGI·Ships to United States

   Terms not yet verified

   Visit 77 Diamonds
7. 7Allurez1,491 in stock

   United States·Founded 2010·GIA, IGI·Ships to United States

   Terms not yet verified

   Visit Allurez
8. 8Rare Carat1,453 in stock

   United States·Founded 2016·GIA, IGI·30-day returns·Ships to United States

   Terms read on the retailer’s own site, October 19, 2026

   Visit Rare Carat
9. 9Yorxs1,299 in stock

   Germany·Founded 2011·GIA, HRD, IGI

   Terms not yet verified

   Visit Yorxs
10. 10B2C Jewels1,239 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

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.

61 of the 72 retailers with shipping details ship to United States. 11 do not. 2 retailers have not published any shipping details.

Each combination below has its own page with the retailers that stock exactly that grade.

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

• 1.5ct H SI1from $3,244 across 13 retailersAs of November 5, 2026
• 1.5ct H SI1from $4,403 across 8 retailersAs of November 5, 2026
• 1.51ct J SI1from $1,940 across 10 retailersAs of November 5, 2026
• 1.5ct J SI1from $2,331 across 9 retailersAs of November 5, 2026
• 1.53ct I SI1from $4,006 across 7 retailersAs of November 6, 2026
• 1.51ct I SI1from $3,828 across 8 retailersAs of November 2, 2026

• Radiant: a rectangular brilliant cut that combines the emerald outline with round-style faceting.
• Natural: mined diamonds with the certification, provenance and resale profile traditional buyers expect.