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Short answer: A well-cut 1 carat round stone measures about 6.4–6.5 mm across, which looks clear and elegant on most hands. At Ivevar, a 1 carat lab grown diamond solitaire costs $1,646 in 14K gold (or $650 in 925 sterling silver), and a 1 carat moissanite solitaire costs $1,347 in 14K gold, at the time of writing. The metal you choose changes the price more than anything else.
How Big Is a 1 Carat Stone?
Carat is a weight (1 carat = 0.2 grams), not a size. A round 1 carat stone is roughly 6.5 mm wide. Elongated shapes such as oval, pear and marquise spread the same weight over a longer outline, so they look a little larger from above. Cut quality also matters: a stone cut too deep hides its weight underneath and looks smaller.
Real Ivevar Prices for a 1 Carat Center Stone
| Ring (1.00 ct center) | 925 Silver | 10K Gold | 14K Gold | 18K Gold |
|---|---|---|---|---|
| Round Lab Diamond Cathedral Solitaire | $650 | $1,376 | $1,646 | $1,916 |
| Oval Lab Diamond Solitaire | $654 | $1,422 | $1,707 | $1,993 |
| Elongated Oval Moissanite Solitaire | $265 | $1,053 | $1,347 | $1,640 |
Prices at the time of writing; check each product page for current prices and stone details.
Best Settings for 1 Carat
A classic four- or six-prong solitaire shows off a 1 carat stone cleanly. A cathedral setting lifts the stone and adds height. A halo or hidden halo makes a 1 carat look closer to a larger stone and adds sparkle. A pavé band adds shine along the finger without taking attention away from the center.
Lab Grown Diamond or Moissanite?
A lab grown diamond is a real diamond grown in a lab. For certification, IGI grades lab grown diamonds on the full 4Cs, while GIA has issued only a Premium or Standard descriptor since October 1, 2025. Moissanite is a different gem with more colorful fire and a lower price; it is not a diamond, and we always label it as moissanite.
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Frequently Asked Questions
How much does a 1 carat engagement ring cost at Ivevar?
At the time of writing, a 1 carat lab grown diamond solitaire is $650 in sterling silver, $1,376 in 10K gold and $1,646 in 14K gold. Moissanite versions cost less.
How wide is a 1 carat round diamond?
About 6.4 to 6.5 mm across when well cut.
Is 1 carat big enough for an engagement ring?
Yes. It is one of the most popular sizes and looks balanced on most hands. A halo or elongated shape can make it look larger.
