1 Carat Diamonds

Make a brilliant statement with a ring or necklace featuring a sparkling 1 carat diamond from Blue Nile. One carat diamonds are very popular here, since they strike a nice balance between size and value. Shop our full selection of 1 carat diamond shapes, prioritizing cut grade to maximise brilliance.


24 of 26,246 1 Carat Diamonds

FAQs About 1 Carat Diamonds

Many factors affect the price of any loose diamond, including shape, carat weight, cut, colour, and clarity. Fancy-cut diamonds are more budget-friendly per carat weight than round brilliant diamonds of the same quality.

The size of a 1 carat diamond varies based on the diamond shape selected. Our diamond size chart breaks down the differences in the shapes.

When you want the look of a 1 carat diamond without a hefty price tag, consider "buying shy." This means purchasing a diamond with a carat size of .90 to .99 instead of a full carat. The difference won't be very discernible to the eye, but it will lower the price.

The term “carat weight” refers to a single diamond. The term “carat total weight” refers to all the diamonds used in a single piece. You'll hear carat total weight with diamond sidestone settings, halo settings, and other styles that use smaller stones to enhance the look of the centre stone.

Top 1 Carat Diamond Reviews

A closeup of a hand wearing four different diamond engagement rings.

Gorgeous Channel Engagement Ring

This ring is absolutely gorgeous, and with a little over 1 carat princess surrounded my multiple stones, it sparkles! I’m super excited to put it on an even more gorgeous woman!
Deanne S. - Verified Buyer
Average Customer Rating $5 out of 5 stars
Princess Cut Channel Set Diamond Engagement Ring
14k White Gold (1/2 ct. tw.)

HK$ 13,925.00

now: HK$ 11,836.30

A woman clasping her hands while wearing a wedding band and engagement ring.

She said yes and LOVED the ring

She absolutely loved this setting! I purchased a 1 carat round diamond for this setting. It's exactly what she was looking for, something simple, and elegant. In her words "It's like the diamond is floating on top!" It really accentuated the diamond. This setting would best suit someone with slender fingers since it's a 2mm setting.
Average Customer Rating $5 out of 5 stars
Monique Lhuillier Amour Solitaire Engagement Ring

HK$ 10,050.00


Explore More Diamonds and Jewellery

Have questions about 1 Carat diamonds?

Get answers day or night.