What to Know

A 3 carat diamond makes a statement. It's one of those sizes that draws attention naturally, which is exactly why so many clients choose it (3 carat diamonds are one of Ada’s most popular sizes for engagement ring center stones).

A round brilliant at this weight measures about 9.3 to 9.4mm face-up, a size that draws attention without trying. It's a size where buyers typically know exactly what they want, and where the quality of the stone becomes just as important as its size. At 3 carats, light performance, color consistency, and clarity are all visible to the naked eye in a way they simply aren't at smaller sizes.

No matter what size diamond you're considering, curation matters. You should never choose a diamond based on a grading report alone. While two diamonds may share identical 4Cs, they can look very different in person. Every diamond at Ada is hand-selected in person by our expert team. We curate only the rare few lab grown diamonds that meet our standards for cut precision, light performance, and beauty in real life.

Why Ada Diamonds

We know that a purchase this important deserves an exceptional experience. Whether you purchase online, or enjoy complimentary design support with a Diamond Concierge, each piece is made to order and crafted in house from start to finish.

Our master jewelers create each setting one at a time, built specifically for its stone. Nothing is mass-produced. Every detail is considered, refined, and made to last for a lifetime.