30 Carat Diamond Ring: Beyond Luxury
A 1 carat diamond is standard. A 5 carat diamond is huge. A 30 carat diamond? That is a paperweight. It is museum quality. It is the realm of royalty and billionaires.
Our team of certified gemologists and jewelry experts provides in-depth analysis to help you make informed purchasing decisions.
How Big is It?
A round brilliant 30 carat diamond is approximately 22mm in diameter.
To visualize this: A US Nickel is 21.2mm. So, imagine strapping a sparkling nickel to your finger. It covers the entire width of the finger and spills over the sides.
The Price Tag
Pricing for diamonds this size is exponential, not linear.
- Low Quality (Industrial/Off-Color): Maybe $500,000 - $1 Million.
- High Quality (D Flawless): $5 Million - $10 Million+.
Famous 30+ Carat Rings
- Elizabeth Taylor: Her famous Krupp Diamond was 33.19 carats. She wore it daily.
- Paris Hilton: Her engagement ring from Paris Latsis was 24 carats (close!). She said it was so heavy it hurt her finger.
Can You Wear It?
Barely. A ring this size is top-heavy. It will spin constantly unless it has a special "euro-shank" (squared bottom) or internal sizing beads to grip the finger. It is not a ring for doing dishes!
Where to Buy
For the best selection and value, we recommend checking these top-rated retailers:
James Allen
Read our reviewBlue Nile
Read our reviewBrilliant Earth
Read our reviewClean Origin
Read our reviewWith Clarity
Read our reviewAbout this guide
Written by the TheCaratCut Editorial Team. Our recommendations follow our editorial policy, and we may earn commissions through affiliate links. See our affiliate disclosure.