Where to buy a 3ct lab-grown marquise diamond

Half of these diamonds are listed between HK$4,256 and HK$8,880 (as of November 7, 2026).

Certificated stones with a recently confirmed price only, 28,207 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. 177 Diamonds17,827 in stock

   United Kingdom·Founded 2005·GCAL, GIA, IGI·Ships to Hong Kong

   Terms not yet verified

   Visit 77 Diamonds
2. 2William & Sons Jewelers16,152 in stock

   United States·GCAL, GIA, IGI·Final sale: no returns

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

   Visit William & Sons Jewelers
3. 3Rare Carat14,400 in stock

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

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

   Visit Rare Carat
4. 4

   Luvansh

   12,930 in stock

   US

   Terms not yet verified
5. 5Loose Grown Diamond11,820 in stock

   United States·Founded 2018·GCAL, GIA, IGI

   Terms not yet verified

   Visit Loose Grown Diamond
6. 6MOH London8,456 in stock

   United Kingdom·GCAL, GIA, IGI

   Terms not yet verified

   Visit MOH London
7. 7Carbon Sparkle8,150 in stock

   United States·GCAL, GIA, IGI·21-day returns·Ships to Hong Kong

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

   Visit Carbon Sparkle
8. 8NZ Jewellers8,096 in stock

   New Zealand·Founded 2006·GCAL, GIA, IGI·30-day returns·Ships to Hong Kong

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

   Visit NZ Jewellers
9. 9Brilliance7,962 in stock

   United States·Founded 2002·GIA, IGI·Ships to Hong Kong

   Terms not yet verified

   Visit Brilliance
10. 10Brilliant Earth7,656 in stock

    United States·Founded 2005·GCAL, GIA, IGI

    Terms not yet verified

    Visit Brilliant Earth

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.

31 of the 58 retailers with shipping details ship to Hong Kong. 27 do not. 16 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.

• 3.07ct E VVS2from $533 across 22 retailersAs of November 6, 2026
• 3.09ct E VVS2from $553 across 21 retailersAs of November 6, 2026
• 3.03ct E VS1from $639 across 6 retailersAs of November 6, 2026
• 3.04ct E VS1from $641 across 6 retailersAs of November 6, 2026
• 3.07ct F VVS2from $487 across 14 retailersAs of November 6, 2026
• 3.06ct F VVS2from $612 across 13 retailersAs of November 2, 2026

• Marquise: a pointed-end ellipse that faces up large for its carat.
• Lab-grown: chemically identical to natural diamonds, typically at least 90% less than a comparable natural cohort from 1 carat up.