A 12-carat diamond engagement ring would be an exceptionally large and valuable piece of jewelry. The carat is a unit of mass used for measuring gemstones and pearls, with one carat equivalent to 200 milligrams. These are the four factors that determine a diamond’s quality and value. The cut refers to how well the diamond is shaped and faceted; color ranges from colorless to light yellow; clarity measures the presence of any internal or external flaws; and carat is the weight of the diamond. A 12-carat diamond is already quite rare, and its value can increase significantly based on its cut, color, and clarity.
1. Kate Middleton
Kate Middleton’s royal engagement broke in 2010, the 12-carat sapphire ring that Prince William whipped out of his backpack at the base of Mt. Kenya for his proposal. Kate’s 12 Carat Sapphire is an oval Ceylon surrounded by 14 solitaire diamonds.
Prince William and Kate Middleton meet while both studying at St. Andrews University in Scotland. Rumor has it that William was won over after seeing Kate modeling at a student fashion show for charity.
2. Khloe Kardashian
Khloe Kardashian’s engagement ring is an amazing piece of Hollywood jewelry. With a huge center stone and countless accent diamonds, it contains approximately 12.5 carats of diamonds altogether and is valued at about $850,000.
After meeting at a party for fellow NBA player Ron Artist in August 2009, Kardashian and Odom quickly began a relationship and were engaged only a few weeks later.
3. Blake Lively
Blake Lively’s Engagement Ring is a 12-carat oval diamond ring from Ryan Reynolds is what Blake Lively sports on her ring finger each and every day. Designed by Lorraine Schwartz, this pink diamond is estimated just over $2 million.
The couple met while filming the movie in 2010, but didn’t begin dating until 2011—and they’ve been one of our favorite celebrity couples ever since.
4. Serena Williams
Serena Williams’s Engagement Ring, It is flanked by two smaller semi-circle half-moon diamonds on each side. The center diamond is estimated to be around 12 carats, making it a rare and very valuable gem. The engagement ring is estimated to be worth around 2 million, which is no surprise given its size and quality.
Williams met Ohanian met by chance when they both sat down next to each other during breakfast at the Cavalieri Hotel in Rome.
5. Gwyneth Paltrow
Gwyneth Paltrow’s engagement ring with this Ascher Cut Diamond Engagement Ring from the 1920s. The gorgeous ring features a large Ascher-cut diamond surrounded by a delicate halo set with micro diamonds.
Experts believe the solitaire ring is around 12 carats, features a round or cushion cut, and has an estimated value of $300,000 – $600,000. But most importantly, they believe it does a better job of highlighting Gwyneth’s bold personality than her previous diamond engagement rings.
6. Jada Pinkett Smith
Will Smith seriously set the bar high when he dropped a quarter-million dollars to get a diamond deserving of the actress. Jada’s ring is a 12- carat Emerald cut diamond ring with two shoulder-set baguette diamonds for his proposal.
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