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4 Carat Lab Grown Diamonds
Make a bold statement with a 4 carat lab-grown diamond. We offer a vast collection of diamonds to help you find the perfect one for whatever occasion you are celebrating. Whether you want a 4 carat lab-grown diamond ring with an elegant 18 carat white gold band or a loose diamond to revive your aunt's vintage engagement ring, we have the piece for you.
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.Shape
Shape influences the personality and price of a diamond.
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.
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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.
Polish
A well-polished diamond will have excellent light return.
Excellent
Very Good
Good
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
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
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.
Lab Diamond Growth Process
Lab diamonds are made using two processes, HPHT and CVD. Both mimic the natural process of earth diamonds. LEARN ABOUT LAB DIAMONDS
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
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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.
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Make a bold statement with a 4 carat lab-grown diamond. We offer a vast collection of diamonds to help you find the perfect one for whatever occasion you are celebrating. Whether you want a 4 carat lab-grown diamond ring with an elegant 18 carat white gold band or a loose diamond to revive your aunt's vintage engagement ring, we have the piece for you.
Why Shop Ritani's Lab-Grown Diamonds
From day one, our name has been synonymous with quality. Our team works to ensure we can provide you with the certifiable quality you deserve. All our diamonds have undergone rigorous grading from some of the world's leading laboratories, including the IGI. Because transparency is at the core of our business, we include every report and certificate with our offerings, so you know precisely how your lab-grown 4 carat diamond is priced.
For clients looking for custom pieces, we pair expertise with the latest technology at our White Plains facility to deliver exceptional jewelry fit for any occasion. Design the perfect engagement ring in our interactive studio, and we will bring it to life.
Your Partner in Luxury
At Ritani, we know diamonds are meant to last. We are here for you from that "I do" to the perfect anniversary gift. Contact us to find out more about our custom services or find the perfect diamond from our inventory.
If you need help selecting your 4 Carat Lab Grown Diamonds, reach out to us at 1-888-9RITANI or chat now.
Shop by Carat Weight
- 0.25 Carat Lab Grown Diamond
- 0.5 Carat Lab Grown Diamond
- 0.75 Carat Lab Grown Diamond
- 1 Carat Lab Grown Diamond
- 1.25 Carat Lab Grown Diamond
- 1.5 Carat Lab Grown Diamond
- 1.75 Carat Lab Grown Diamond
- 2 Carat Lab Grown Diamond
- 2.5 Carat Lab Grown Diamond
- 3 Carat Lab Grown Diamond
- 3.5 Carat Lab Grown Diamond
- 4 Carat Lab Grown Diamond
- 5 Carat Lab Grown Diamond
Shop by Shape
Shop by Color
Shop by Cut
Frequently Asked Questions
Are 4-carat lab-grown diamonds available in different shapes?
Yes, 4-carat lab-grown diamonds are available in various shapes including round, cushion, princess, asscher, oval, emerald, radiant, heart, pear, and marquise.Can I customize the setting for a 4-carat lab-grown diamond?
Yes, you can customize the setting for a 4-carat lab-grown diamond by selecting your preferred setting style and metal on Ritani's website.Can I insure my 4-carat lab-grown diamond ring?
Yes, you can insure your 4-carat lab-grown diamond ring just like any other piece of valuable jewelry.Can I view 4-carat lab-grown diamonds before purchasing?
Yes, you can view 4-carat lab-grown diamonds through Ritani s "Try Before You Buy" program, where you can schedule an in-person preview with a Preview Specialist.Do 4-carat lab-grown diamonds come with a certification?
Yes, all 4-carat lab-grown diamonds at Ritani are certified by reputable gemological laboratories such as GIA, IGI, or AGS.How do I care for a 4-carat lab-grown diamond ring?
To care for a 4-carat lab-grown 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 4-carat lab-grown diamond rings?
Yes, Ritani offers a lifetime warranty on all engagement rings and wedding bands, including those with 4-carat lab-grown diamonds, covering manufacturing defects.What is the price range for 4-carat lab-grown diamonds at Ritani?
The price range for 4-carat lab-grown diamonds at Ritani varies based on the diamond's quality, including its cut, color, clarity, and certification. Prices typically start from around $12,000 and can go up significantly.What is the return policy for 4-carat lab-grown diamonds?
Ritani offers a 30-day return policy for 4-carat lab-grown diamonds, provided the items are in their original condition and accompanied by all documentation.What settings are best for 4-carat lab-grown diamonds?
The best settings for a 4-carat lab-grown diamond are those that securely hold the diamond while showcasing its size and brilliance. Popular settings include solitaire, halo, and three-stone settings.
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