Where to buy a 1.5ct natural marquise diamond

Half of these diamonds are listed between A$7,123 and A$15,295 (as of November 7, 2026).

Certificated stones with a recently confirmed price only, 2,619 of them. Each contributes its cheapest confirmed price.

As of November 7, 2026, the same certified diamond typically costs 44% more at a typical retailer than at the cheapest for lab-grown stones, and 21% 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 Jewellers2,148 in stock

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

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

   Visit NZ Jewellers
2. 2Carbon Sparkle1,748 in stock

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

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

   Visit Carbon Sparkle
3. 3

   The Perfect Carat

   1,451 in stock

   US·EGL, GIA, HRD, IGI

   Terms not yet verified
4. 4MOH London1,290 in stock

   United Kingdom·EGL, GIA, HRD, IGI

   Terms not yet verified

   Visit MOH London
5. 5Rare Carat1,265 in stock

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

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

   Visit Rare Carat
6. 6Aurelinne1,109 in stock

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

   Terms not yet verified

   Visit Aurelinne
7. 777 Diamonds1,083 in stock

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

   Terms not yet verified

   Visit 77 Diamonds
8. 8

   Luvansh

   1,049 in stock

   US

   Terms not yet verified
9. 9Yorxs970 in stock

   Germany·Founded 2011·GIA, HRD, IGI

   Terms not yet verified

   Visit Yorxs
10. 10Diamond Wish868 in stock

    United States·Founded 2012·GIA·Ships to Australia

    Terms not yet verified

    Visit Diamond Wish

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.

45 of the 66 retailers with shipping details ship to Australia. 21 do not. 15 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.

• 1.51ct H SI2from $2,222 across 10 retailersAs of November 4, 2026
• 1.51ct H SI2from $3,678 across 10 retailersAs of November 7, 2026
• 1.51ct G SI2from $3,206 across 7 retailersAs of November 7, 2026
• 1.51ct G SI2from $3,376 across 11 retailersAs of November 7, 2026
• 1.52ct I SI2from $3,091 across 15 retailersAs of November 7, 2026
• 1.5ct I SI2from $2,618 across 7 retailersAs of November 7, 2026

• Marquise: a pointed-end ellipse that faces up large for its carat.
• Natural: mined diamonds with the certification, provenance and resale profile traditional buyers expect.