1 Choose your diamond
1. Diamond
2 Choose your Setting
2. Setting
3 View Completed
3. Preview
Round Cut Diamonds
Our impressive collection of round-cut diamonds captures the timeless brilliance this sought-after cut is renowned for. Whether you're looking for a round-cut diamond ring or a round-cut loose diamond for a custom design, Ritani offers unmatched quality and value with every piece.
Quick Ship Diamonds
Quick Ship Diamonds
Shop loose diamonds that ship in 2 days or less. Delivery dates may change if you add your diamond to a setting.Best Value
Best Value
Shop loose diamonds in our inventory that we have identified as being Best Value. Best price and balance of the 4C's on the market.Ritani Reserve 
Ritani Reserve
Ritani Reserve Diamonds are an exclusive selection of diamonds that have the best cut which offers maximum sparkle. They reflect the most light, maximum brilliance, fire, and scintillation.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.
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.
Polish
A well-polished diamond will have excellent light return.
More Filters
Girdle Thickness
The girdle is the outer edge of the diamond, where the crown top meets the pavilion bottom.
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.
Price Per Carat
Crown Angle
Pavilion Angle
Width (mm)
Height (mm)
Length (mm)
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.
Girdle Thickness
The girdle is the outer edge of the diamond, where the crown top meets the pavilion bottom.
Thin
Medium
Sli. Thick
Thick
Very Thick
Ext. Thick
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.
None
Faint
Medium
Strong
Very Strong
Price Per Carat
Crown Angle
Pavilion Angle
Width (mm)
Height (mm)
Length (mm)
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.
Excellent
Very Good
Good
Fair
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.
None
Very Small
Medium
Slightly Large
Large
Certificate
All of Ritani’s natural diamonds are certified by either the GIA or AGSL, the industry’s two most respected grading labs.
Quick Ship Diamonds
Quick Ship Diamonds
Shop loose diamonds that ship in 2 days or less. Delivery dates may change if you add your diamond to a setting.Best Value
Best Value
Shop loose diamonds in our inventory that we have identified as being Best Value. Best price and balance of the 4C's on the market.Ritani Reserve
Ritani Reserve
Ritani Reserve Diamonds are an exclusive selection of diamonds that have the best cut which offers maximum sparkle. They reflect the most light, maximum brilliance, fire, and scintillation.
GEMOLOGIST PICKS
CLOSE
These diamonds were hand picked by our in house gemologists who focus on balancing the 4 C's and best value pricing. Our gemologists are always here to help you find the diamond of your dreams. Chat Now
Did you know?
You can connect with a commission free gemologist instantly and receive a live diamond inspection on any diamond. You can also connect and shop together and compare up-to three diamonds at a time instantly. Try it out. Start your diamond concierge consultation today.
START NOW
You’ve viewed 24 of 197,664 products
Our impressive collection of round-cut diamonds captures the timeless brilliance this sought-after cut is renowned for. Whether you're looking for a round-cut diamond ring or a round-cut loose diamond for a custom design, Ritani offers unmatched quality and value with every piece.
About Round-Cut Loose Diamonds
Round diamonds are one of the most popular cuts for engagement rings, and for good reason. Their uniform and symmetrical shape offers a classic design that reflects the most light, giving it an exceptional sparkle. These stunning diamonds symbolize eternal and everlasting love, making them an ideal choice for a lifelong commitment. Round-cut loose diamonds are also perfect for necklaces and other fine jewelry.
Experience the Ritani Difference
At Ritani, we have an extensive selection of masterfully crafted round-cut diamonds. When you choose our diamonds, you can benefit from:
- Expert craftsmanship: Our skilled artisans and advanced technology ensure every round-cut diamond is perfectly crafted.
- Customization: Design custom round-shaped diamond jewelry that reflects your unique story. Select your ideal diamond, setting, and metal and let our team bring your vision to life.
- In-person previews: Our specialists conduct in-person previews, allowing you to physically examine the diamond before purchasing.
- Transparent pricing: We offer upfront, transparent pricing on all our round-cut diamonds.
Shop by Carat Weight
- 0.25 Carat Round Cut Diamond
- 0.5 Carat Round Cut Diamond
- 0.75 Carat Round Cut Diamond
- 1 Carat Round Cut Diamond
- 1.25 Carat Round Cut Diamond
- 1.5 Carat Round Cut Diamond
- 1.75 Carat Round Cut Diamond
- 2 Carat Round Cut Diamond
- 2.5 Carat Round Cut Diamond
- 3 Carat Round Cut Diamond
- 3.5 Carat Round Cut Diamond
- 4 Carat Round Cut Diamond
- 5 Carat Round Cut Diamond
Shop by Shape
Shop by Color
Frequently Asked Questions
Are round-cut diamonds available in different carat weights?
Yes, round-cut diamonds are available in various carat weights ranging from under 1 carat to over 5 carats.Can I customize the setting for a round-cut diamond?
Yes, you can customize the setting for a round-cut diamond by selecting your preferred setting style and metal on Ritani's website.Can I insure my round-cut diamond ring?
Yes, you can insure your round-cut diamond ring just like any other piece of valuable jewelry.Can I view round-cut diamonds in person before purchasing?
Yes, you can view round-cut diamonds through Ritani s "Try Before You Buy" program, where you can schedule an in-person preview with a Preview Specialist.Do round-cut diamonds come with certification?
Yes, all round-cut diamonds at Ritani come with certification from reputable gemological laboratories such as GIA, AGS, or IGI.How do I care for a round-cut diamond ring?
To care for a round-cut diamond ring, clean it regularly with a mild soap solution and a soft brush, avoid harsh chemicals, and store it safely when not in use. Regular professional inspections and cleanings are also recommended.Is there a warranty on round-cut diamond rings?
Yes, Ritani offers a lifetime warranty on all engagement rings and wedding bands, including those with round-cut diamonds, covering manufacturing defects.What is the price range for round-cut diamonds at Ritani?
The price range for round-cut diamonds at Ritani varies based on the diamond's carat weight, cut, color, clarity, and certification. Prices typically start from around $1,500 and can go up significantly.What is the return policy for round-cut diamonds?
Ritani offers a 30-day return policy for round-cut diamonds, provided the items are in their original condition and accompanied by all documentation.What settings are best for round-cut diamonds?
The best settings for round-cut diamonds are those that securely hold the diamond while showcasing its brilliance. Popular settings include solitaire, halo, and three-stone settings.
Copyright © Ritani 2025