Cart (0)
1 Choose your diamond
1. Diamond
Design Diamond Icon
2 Choose your Setting
2. Setting
Design Ring Setting Icon
3 View Completed
3. Preview
Design Ring Setting Icon
Edit Columns

3 Carat Lab Grown Diamonds

Shop our beautiful collection of 3 Carat Lab Grown Diamonds. Take advantage of our diamond transparency to see the wholesale cost of your diamond! Look for the best value badge to find the best priced diamonds in the market.

Filters:
Quick Ship Diamonds
Tool Tip Icon
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
Tool Tip Icon
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
Tool Tip Icon
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.
More Filters
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
Tool Tip Icon
A well-polished diamond will have excellent light return.
Excellent
Very Good
Good
Fluorescence
Tool Tip Icon
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
Very Strong
Depth
Tool Tip Icon
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
Tool Tip Icon
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
Tool Tip Icon
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
Tool Tip Icon
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
Tool Tip Icon
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
Small
Large
Certificate
Tool Tip Icon
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
Tool Tip Icon

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
Tool Tip Icon
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
Tool Tip Icon
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
Tool Tip Icon
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.
3.22 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,134.00
3.22Carat
HColor
SI1Clarity
IdealCut
Get an in depth analysis of this diamond.

3.00 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,149.00
3Carat
GColor
SI1Clarity
IdealCut
Get an in depth analysis of this diamond.

3.00 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,149.00
3Carat
GColor
SI1Clarity
IdealCut
Get an in depth analysis of this diamond.

3.21 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,155.00
3.21Carat
HColor
VS2Clarity
IdealCut
Get an in depth analysis of this diamond.

3.22 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,159.00
3.22Carat
HColor
VS2Clarity
IdealCut
Get an in depth analysis of this diamond.

3.25 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,159.00
3.25Carat
GColor
SI1Clarity
IdealCut
Get an in depth analysis of this diamond.

3.23 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,162.00
3.23Carat
IColor
SI1Clarity
IdealCut
Get an in depth analysis of this diamond.

3.11 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,182.00
3.11Carat
HColor
VS2Clarity
IdealCut
Get an in depth analysis of this diamond.

GEMOLOGIST PICKS
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
3.11 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,996.00
3.11Carat
GColor
VS2Clarity
IdealCut
Get an in depth analysis of this diamond.

3.04 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$2,015.00
3.04Carat
IColor
VS2Clarity
IdealCut
Get an in depth analysis of this diamond.

3.04 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$2,015.00
3.04Carat
IColor
VS2Clarity
IdealCut
Get an in depth analysis of this diamond.

Chat with a gemologist
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
3.01 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,183.00
3.01Carat
IColor
VS2Clarity
IdealCut
Get an in depth analysis of this diamond.

3.12 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,186.00
3.12Carat
HColor
VS2Clarity
IdealCut
Get an in depth analysis of this diamond.

3.13 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,190.00
3.13Carat
HColor
VS2Clarity
IdealCut
Get an in depth analysis of this diamond.

3.13 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,190.00
3.13Carat
HColor
VS2Clarity
IdealCut
Get an in depth analysis of this diamond.

3.13 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,190.00
3.13Carat
HColor
VS2Clarity
IdealCut
Get an in depth analysis of this diamond.

3.13 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,190.00
3.13Carat
HColor
VS2Clarity
IdealCut
Get an in depth analysis of this diamond.

3.01 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,193.00
3.01Carat
GColor
SI1Clarity
IdealCut
Get an in depth analysis of this diamond.

3.14 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,194.00
3.14Carat
HColor
VS2Clarity
IdealCut
Get an in depth analysis of this diamond.

3.12 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,195.00
3.12Carat
GColor
SI1Clarity
IdealCut
Get an in depth analysis of this diamond.

3.18 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,197.00
3.18Carat
GColor
SI1Clarity
IdealCut
Get an in depth analysis of this diamond.

3.15 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,198.00
3.15Carat
HColor
VS2Clarity
IdealCut
Get an in depth analysis of this diamond.

3.16 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,201.00
3.16Carat
HColor
VS2Clarity
IdealCut
Get an in depth analysis of this diamond.

3.03 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,201.00
3.03Carat
GColor
SI1Clarity
IdealCut
Get an in depth analysis of this diamond.

3.00 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,202.00
3Carat
HColor
VS2Clarity
IdealCut
Get an in depth analysis of this diamond.

3.14 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,203.00
3.14Carat
GColor
SI1Clarity
IdealCut
Get an in depth analysis of this diamond.

3.14 Carat Round Lab Diamond
Video play badge
Lab
BEST VALUE
Add To List
Add To Compare
Save for later

$1,203.00
3.14Carat
GColor
SI1Clarity
IdealCut
Get an in depth analysis of this diamond.

You’ve viewed 24 of 30,410 products

Shop our beautiful collection of 3 Carat Lab Grown Diamonds. Take advantage of our diamond transparency to see the wholesale cost of your diamond! Look for the best value badge to find the best priced diamonds in the market.

3 Carat Lab Grown Diamonds by Ritani

Carat Weight

Undoubtedly impressive in its enormity, a 3-carat diamond, regardless of its cut or jewelry setting, is guaranteed to attract attention. An engagement ring featuring a 3-carat diamond always makes an unquestionably bold presentation, as the average carat size for an engagement ring in the United States is typically around 1 carat. While 3-carat stones look stunning in all diamond cuts, specific cuts distribute their weight differently from other shapes. For example, asscher-cut and cushion-cut diamonds are renowned for their depth, making them ideal for larger-carat stones.

All Ritani lab-grown diamonds are certified by International Gemological Institute, (IGI) the most respected independent lab diamond grading laboratory.

Lab Grown Diamonds

Lab grown diamonds are real diamonds that are created in the lab instead of deep inside the earth's crust. They are physically, chemically, and visually identical to earth grown diamonds and are indistinguishable even by a trained gemologist.

The only difference between lab grown diamonds and earth grown diamonds is how they were created. Earth grown diamonds are created under high pressure and temperature deep under the earth's surface, while lab grown diamonds are created under high pressure and temperature(HPHT) in a lab

Lab grown diamonds are typically between 30 and 50 percent cheaper than earth grown diamonds! Therefore they have become a very popular choice for engagement ring, since you can get a bigger size diamond for your budget.

All Ritani lab grown diamonds are certified. Most of our lab grown diamonds are certified by IGI, the most respected independent lab diamond grading laboratory.

If you need help selecting your 3 Carat Lab Grown Diamonds, reach out to us at 1-888-9RITANI or chat now.

Frequently Asked Questions

  • Are 3-carat lab-grown diamonds available in different shapes?
    arrow

    Yes, 3-carat lab-grown diamonds are available in various shapes including round, cushion, princess, asscher, oval, emerald, radiant, heart, pear, and marquise.
  • Are Ritani's 3 carat lab-made diamonds ethically sourced?
    arrow

    Yes, Ritani is committed to ethical sourcing. All of our lab-grown diamonds, including the 3 carat diamonds, are created using environmentally friendly processes and are conflict-free.
  • Can I customize jewelry with a 3 carat lab diamond?
    arrow

    Yes, you can customize jewelry with a 3 carat lab-grown diamond at Ritani. You can select the type of metal, setting style, and other details to create a unique piece that reflects your personal style.
  • Can I customize the setting for a 3-carat lab-made diamond?
    arrow

    Yes, you can customize the setting for a 3-carat lab-grown diamond.
  • Can I insure my 3-carat lab-created diamond ring?
    arrow

    Yes, you can insure your 3-carat lab-grown diamond ring just like any other piece of valuable jewelry.
  • Can I preview a 3 carat lab-grown diamond before purchasing it?
    arrow

    Yes, Ritani offers a free in-person preview program that allows you to see a 3 carat lab-grown diamond before purchasing it. You can select a diamond online and have it sent to a participating jeweler near you for an in-person viewing.
  • Do 3-carat lab-grown diamonds come with a certification?
    arrow

    Yes, all 3-carat lab-grown diamonds at Ritani are certified by reputable gemological laboratories such as GIA, IGI, or AGS.
  • Do you offer financing options for 3 carat lab-grown diamond purchases?
    arrow

    Yes, we offer financing options for 3 carat lab-grown diamond purchases through Affirm. You can choose to pay for your diamond over time with easy monthly payments. Select Affirm at checkout to apply.
  • How are 3 carat lab-grown diamonds certified?
    arrow

    Ritani's 3 carat lab-grown diamonds are certified by reputable gemological laboratories such as the Gemological Institute of America (GIA) and the International Gemological Institute (IGI). These certifications provide an assessment of the diamond's quality and authenticity.
  • How do I care for a 3-carat lab grown diamond ring?
    arrow

    To care for a 3-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.
  • How do I choose the right 3 carat lab-grown diamond?
    arrow

    To choose the right 3 carat lab-grown diamond, consider the 4 Cs: cut, color, clarity, and carat weight. Our website offers detailed guides and filters to help you find a diamond that matches your specifications and budget.
  • Is there a warranty on 3-carat lab-made diamond rings?
    arrow

    Yes, Ritani offers a lifetime warranty on all engagement rings and wedding bands, including those with 3-carat lab-grown diamonds, covering manufacturing defects.
  • What factors influence the price of a 3 carat lab-grown diamond?
    arrow

    The price of a 3 carat lab-grown diamond is influenced by its cut, color, clarity, and carat weight. Lab-grown diamonds are typically more affordable than natural diamonds of comparable quality.
  • What is the price range for 3-carat lab-grown diamonds at Ritani?
    arrow

    The price range for 3-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 $15,000 and can go up significantly.
  • What is the return policy for 3-carat lab made diamonds?
    arrow

    Ritani offers a 30-day return policy for 3-carat lab-grown diamonds, provided the items are in their original condition and accompanied by all documentation.
  • What settings are best for 3-carat lab-grown diamonds?
    arrow

    The best settings for a 3-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.