1 carat diamonds
Perfectly balanced for everyday elegance or special occasions, each piece in our 1 to 2 carats lab grown diamond collection offers exceptional brilliance and outstanding value.
Created in 18k White Gold, our diamond rings, earrings and necklaces can also be custom-made in 14K, Yellow Gold and Rose Gold at no additional cost. Contact us for customized orders.
Quick guide to 1 carat diamond rings
Diamond Academy - Learn all about diamonds before you buy
Looking for the perfect 1 carat diamond ring? Learn everything about size, value, and why 1 carat diamonds are perfect choice for engagement rings and diamond earrings.
If you're shopping for a diamond ring or earrings, chances are you’ve come across the 1 carat diamond. It’s a classic choice—elegant, eye-catching, and just the right size for many styles and budgets. But what exactly does 1 carat mean, and why are lab-grown 1 carat diamonds so popular in Singapore and globally?
What Does “1 Carat” Really Mean?
A carat is a unit of weight used to measure diamonds and other gemstones. One carat is equal to 200 milligrams. But here’s the key: carat weight isn’t the same as size. The way a diamond is cut can affect how large or small it appears.
For example, a 1 carat round brilliant cut diamond typically measures about 6.4–6.5mm in diameter. Other shapes, like ovals or pears, can look bigger even at the same carat weight.
Here’s a rough size guide for different cuts:
- Round: ~6.4 mm
- Oval: ~8 x 5.5 mm
- Emerald: ~6.5 x 5 mm
- Cushion: ~5.5 x 5.5 mm
- Princess: ~5.5 x 5.5 mm
- Pear: ~8.5 x 5.5 mm
So if you're asking, "How big is a 1 carat diamond?", it depends on the cut. But generally across all shapes, it's considered a perfect balance between presence and practicality.
Whether you’re buying for an engagement, anniversary, or personal milestone, a 1 carat diamond ring is a meaningful choice.
What is better: a 1 carat or 2 carat diamond?
For those seeking a traditional option, a 1 carat diamond is ideal. However, if you desire a larger and bolder appearance, a 2 carat lab grown diamond, appearing up to 50% larger, may be a perfect choice.
Recently viewed
The Art of Handpicked Perfection
At Carat Heritage, true brilliance isn’t just about meeting standards—it’s about exceeding them. While certificates like IGI or GIA provide valuable technical insights into a diamond’s quality, they can never fully capture the beauty, fire, and soul of each stone.
That’s why every diamond used in your jewelry is more than just certified; it’s handpicked by our experts, who examine each stone with their own eyes.
Learn More About Diamond Rings
15 Iconic Celebrity Diamond Rings
From Zendaya to Selena Gomez, explore 15 iconic celebrity engagement rings — the cuts, carats, and stories behind them, and how to get the look.
How to Choose a Cushion Cut Diamond for Your Engagement Ring
There is a reason the cushion cut has outlasted nearly every trend in fine jewellery. It has been catching candlelight since the 1700s, and it still looks just as at home on a hand today. Soft, rounded corners. A pillowed silhouette. A warmth that a round brilliant or a princess cut simply doesn't have.
Join us at Hitcheed Wedding Wonderland on 18-19 July 2026
Join us at Wedding Wonderland on 18-19 July. Whether you're planning a wedding, treating yourself, or simply love beautiful things, we'll be there with a wide selection of our pieces — from tennis bracelets to eternity rings — for you to see and try in person, along with special pricing available exclusively for the event.