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1 Carat Round Cut Diamonds

Price
Many factors impact diamond price. With Ritani's Diamond Price Match Guarantee you can be confident you'll get the best price for a diamond. Tip: Tradition tells you to budget 2-3 months' salary for your ring. We say, just do you.
Carat
Carat is the measure of a diamond's weight and size. We offer an array of high-quality diamonds ranging from 0.18 to 25.00 carats- with 1.00 carat being the most popular.
Color
A diamond’s color grade actually measures how little color it reflects. To strike the best balance between cost and beauty, go for diamonds in the Near Colorless range: G, H, and I.
Yellow Diamonds (Choose Below)
Clarity
Clarity indicates how many flaws are visible to the naked eye. Too many flaws can detract from a diamond's beauty.
Cut
Cut is the quality of a diamond’s proportions and symmetry. The better a diamond’s proportions and symmetry, the more sparkle it will produce. Cut is the most important of the 4 Cs.
Delivery Date
In a rush to get your diamond? Choose your ideal delivery date.
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Polish
A well-polished diamond will have excellent light return.
Fluorescence
Some diamonds glow blue or green when exposed to UV light. Since fluorescence is rarely visible, it has minimal impact on the appearance of your diamond. To save money, go for medium fluorescence.
Depth
Depth percentage correlates with a diamond's sparkle factor. It is measured by dividing the diamond height by its diameter. For maximum sparkle, the depth percentage of a round diamond should be between 54% and 66%.
Length/Width Ratio
The proportional relationship between your diamond’s length and width. A perfect round diamond would measure equally 1-to-1, so its LxW ratio would measure as 1.
Symmetry
Symmetry tells you how well a diamond’s facets align to create sparkle. Diamonds with perfect symmetry create the most sparkle and earn a grade of Excellent or Ideal.
Table
Table percentage tells you how big a diamond’s topmost facet (aka table) is in comparison to its diameter (aka girdle). When that ratio is in the right range, a diamond will sparkle more.
Culet
The culet is the point at the bottom of the diamond. If the point has a facet on it, it can stop light from reflecting and detract from the diamond's sparkle. Choose a diamond with no culet for optimum sparkle.
Certificate
All of Ritani’s natural diamonds are certified by either the GIA or AGSL, the industry’s two most respected grading labs.
12,348  products
1.00 Carat Round Diamond
Best Value
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$1,708.00
Good | L | SI1
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1.00 Carat Round Diamond
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$1,747.00
Ideal | L | SI2
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1.00 Carat Round Diamond
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$1,795.00
Very Good | L | SI2
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1.01 Carat Round Diamond
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$1,812.00
Very Good | L | SI2
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1.00 Carat Round Diamond
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$1,834.00
Good | L | SI1
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1.00 Carat Round Diamond
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$1,872.00
Very Good | L | SI2
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1.02 Carat Round Diamond
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$1,883.00
Very Good | L | SI2
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1.00 Carat Round Diamond
Best Value
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$1,922.00
Ideal | L | SI2
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RECOMMENDED DIAMONDS
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We’re here to give you all the tools you need to help you find the best diamond for your budget. Our goal is to provide the most affordable diamonds with transparent pricing. We’ve made shopping even easier for you by labeling our lowest priced diamonds with the Best Value badge.
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1.05 Carat Round Diamond
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$7,461.00
Ideal | F | VS2
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WANT TO VIEW MORE RECOMMENDATIONS?
Change your filters to view even more diamond recommendations, or chat with a gemologist to find the right diamond for you.
1.01 Carat Round Diamond
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$1,934.00
Good | L | SI1
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1.01 Carat Round Diamond
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$1,976.00
Good | K | SI2
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1.01 Carat Round Diamond
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$1,983.00
Good | L | SI1
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1.04 Carat Round Diamond
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$2,015.00
Ideal | L | SI1
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1.01 Carat Round Diamond
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$2,025.00
Very Good | L | SI1
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1.00 Carat Round Diamond
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$2,028.00
Ideal | L | SI2
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1.00 Carat Round Diamond
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$2,035.00
Ideal | L | SI1
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1.05 Carat Round Diamond
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$2,037.00
Ideal | L | SI2
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1.01 Carat Round Diamond
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$2,053.00
Ideal | L | SI2
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1.00 Carat Round Diamond
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$2,062.00
Good | K | SI2
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1.00 Carat Round Diamond
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$2,062.00
Good | K | SI2
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1.07 Carat Round Diamond
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$2,065.00
Ideal | L | SI2
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1.00 Carat Round Diamond
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$2,075.00
Ideal | K | SI2
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1.00 Carat Round Diamond
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$2,084.00
Very Good | K | SI2
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1.00 Carat Round Diamond
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$2,085.00
Very Good | L | SI1
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1.01 Carat Round Diamond
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$2,087.00
Good | K | SI2
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1 Carat Round Cut Diamonds

Carat Weight

1 carat diamonds are very popular for engagement rings, diamond earrings, or diamond pendants. They provide a good balance between size and price.

Round Diamonds

Round cut diamonds (also called brilliant-cut diamonds) are revered for their classic shape and incredible sparkle. Cut with 58 facets — or 57, if there is no culet — the round shape was designed to produce as much sparkle as possible. As sparkle is what many people are looking for when they buy a diamond, round cuts are immensely popular.

60% of the diamonds in our inventory are round-shaped, making it easy for you to find the right one for your needs. Not only are round cut diamonds the most sparkly, but they are also the most popular diamond shape. However, because they are the most sparkly and the most popular, this makes them the most expensive diamond shape.

Round cut diamonds are perfect for custom jewelry, such as earrings and pendants. To make your round cut diamond appear even larger, choose a halo setting. Or let your round cut diamond stand out on its own in a solitaire setting.

Earth Grown Diamonds

Earth grown diamonds are mined from deep under the earth's surface where they have lain dormant for millions of years. When you hold an earth grown diamond, reflect on the immense journey this diamond has taken and the history it has endured.

A diamond starts out in the lowly form of graphite, such as you might find in the tip of your pencil. Over the course of hundreds of millions of years, the immense pressure and temperature produced deep inside the earth rearrange the carbon atoms into a crystal structure.

Then miners dig deep tunnels under the earth and collect the rough diamonds. The rough diamond looks nothing like the sparkly diamond you are holding. It has an irregular shape, is very dirty and looks dull. The diamond is then cleaned, cut into it's desired shape, and finally polished into the beautiful diamond you are now holding!

All Ritani earth grown diamonds are certified by either the AGS or GIA – the two most respected independent grading labs in the world.

If you need help selecting your 1 Carat Round Cut Diamond, reach out to us at 1-888-9RITANI or chat now.

Frequently Asked Questions

  • How much does a 1 Carat Round Cut Diamond cost?
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    A 1 Carat Round Cut Diamond can cost anywhere between $1,700 and $21,000 depending on the 4 cs. The median price is $5,100.

  • How much does a 1 carat diamond weigh?
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    A 1 carat diamond weighs 0.2 grams or 200 milligrams.

  • How big is a 1 Carat Round Cut Diamond?
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    1 Carat Round Cut Diamonds do not all have the same dimensions, since carat is a measure of weight, not size.

    Here you can see the range of dimensions for a 1 Carat Round Cut Diamond

    LowHighMedian
    Length (mm)66.86.4
    Width (mm)5.46.86.4
    Depth (mm)3.44.24
    Length to width ratio (mm)11.21