Diamond Education

4 Carat Diamond Guide

Among the various carat weights available, the allure of a 4 carat diamond is particularly irresistible. Renowned for their substantial size and remarkable beauty, these exquisite gems possess an undeniable presence that turns heads and ignites admiration.

In this article, we embark on a journey to unravel the magnificence of 4 carat diamonds, delving into their size, cost, and origin. We'll explore the differences between natural and lab-grown options, highlighting the distinctive characteristics and considerations associated with each.

Additionally, we'll discuss various settings that enhance the splendor of a 4 carat diamond, as well as provide guidance on where to find these exceptional treasures.


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How Big is a 4 Carat Diamond?

When it comes to diamonds, carat weight plays a significant role in determining their size and overall impact. A 4 carat diamond is undoubtedly a substantial gemstone that commands attention with its remarkable presence. Let's explore the dimensions and measurements of a 4 carat diamond to gain a clearer understanding of its size:

Image Courtesy: Whiteflash

Carat Weight: A 4 carat diamond weighs approximately 0.8 grams. It is a significant leap in size compared to smaller carat weights and can make a bold statement when adorned in jewelry.

Diameter: The diameter of a 4 carat diamond varies depending on its shape. Here's a table that provides approximate measurements for different diamond shapes:


Diamond Shape Typical Measurements (L x W in mm)

Diamond Shape Average Diameter (mm)
Round 10.32
Princess 8.75 × 8.75
Emerald 11 x 9
Asscher 8.91 × 8.91
Radiant 9.17×9.17
Oval 12.8 x 8.6
Pear 14.0 x 8.0
Marquise 16.5 x 8.5
Heart 10.5 x 10.5
Cushion 9.5 x 9.5



Depth: The depth of a 4 carat diamond also varies based on its cut and shape. On average, the depth of a round brilliant 4 carat diamond falls between 61% to 63% of its diameter.

Face-up Size: The face-up size, or the visible surface area of a 4 carat diamond, largely depends on its shape and cut. Some shapes, such as the marquise or oval, tend to have larger face-up sizes compared to round or princess cuts.

It's important to note that while carat weight provides a general indication of a diamond's size, factors such as cut, shape, and proportions can significantly impact how large a diamond appears. Additionally, personal preferences and style choices can influence the perceived size as well.

How much does a 4 Carat Diamond Cost?

The cost of a 4 carat diamond can vary significantly depending on several factors, including the diamond's quality, cut, color, clarity, and whether it is a natural or lab-grown diamond. As of today, 18th July 2023, here's an overview of the approximate price range for 4 carat diamonds:

Natural 4 Carat Diamonds:

Round Diamonds: A natural round 4 carat diamond can cost anywhere from $41,000 to $300,000 or even more, depending on the specific characteristics and quality of the stone. Factors such as cut, color, and clarity grades significantly influence the price.

4.01 carat H SI1 Round Excellent Cut Diamond from James Allen

4.01 carat H SI1 Round Excellent Cut Diamond from James Allen

Fancy Shape Diamonds: Fancy shape natural 4 carat diamonds, including princess, emerald, cushion, pear, and marquise cuts, generally have a slightly lower price range compared to round diamonds. Depending on the shape and quality, prices can range from approximately $35,000 to $250,000.

Lab-Grown 4 Carat Diamonds:

Round Diamonds: Lab-grown round 4 carat diamonds offer an alternative option at a more affordable price compared to natural diamonds. Prices for lab-grown round 4 carat diamonds typically range from around $3,300 up to $18,000, depending on the quality and the specific lab-grown diamond producer.

4.03 ct E VVS1 Round Cut Precision Lab Grown Diamond

4.03 ct E VVS1 Round Cut Precision Lab Grown Diamond from Whiteflash

Fancy Shape Diamonds: Similar to natural diamonds, lab-grown fancy shape 4 carat diamonds, such as princess, emerald, cushion, pear, and marquise cuts, generally have a slightly lower price range compared to round diamonds. Prices for lab-grown fancy shape 4 carat diamonds can vary from approximately $3,000 up to $16,000.

It's important to note that the prices mentioned above are approximate and can vary based on the market, diamond quality, supplier, and other factors. Additionally, the price of diamonds can fluctuate over time due to market conditions and trends.

When considering the purchase of a 4 carat diamond, it's crucial to evaluate and prioritize your preferences, budget, and desired qualities in order to find the best option that aligns with your individual preferences and requirements.

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Natural 4 Carat Diamonds:

When it comes to natural diamonds, the renowned 4Cscut, color, clarity, and carat weight—play a crucial role in determining their quality and value. Here are some important considerations and tips when selecting a natural 4 carat diamond:

Cut: The cut of a diamond greatly affects its brilliance, fire, and overall beauty. Aim for a well-cut diamond that maximizes its light performance and showcases its natural sparkle. Look for diamonds with excellent or very good cut grades for optimal brilliance.

Color: Color grades refer to the presence of any noticeable tint in a diamond. For a white diamond, aim for a color grade between D (colorless) and H (near colorless) to ensure a visually pleasing stone. Remember that color preferences can vary, so choose a diamond that appeals to your personal taste.

Clarity: Clarity relates to the presence of internal or external flaws, known as inclusions and blemishes, respectively. Seek diamonds with eye-clean clarity, meaning the flaws are not visible to the naked eye. Consider diamonds with clarity grades of VS2 (very slightly included) or higher for a balance between quality and value.

Carat Weight: A 4 carat diamond offers substantial size and presence. However, keep in mind that carat weight alone does not determine a diamond's beauty. It is important to consider the other 3Cs along with carat weight to find a well-balanced and visually appealing diamond.

Tips for Selection:

Focus on GIA Certification: The Gemological Institute of America (GIA) is one of the most reputable diamond grading laboratories. When purchasing a natural 4 carat diamond, prioritize those with GIA certification. This ensures that the diamond's characteristics and quality have been evaluated and documented by an unbiased and trusted authority.

Light Performance Images and Videos: Request light performance images and videos of the diamond you're interested in. These visuals provide valuable insights into how the diamond interacts with light, showcasing its brilliance, fire, and scintillation. Evaluating light performance can help you make an informed decision and appreciate the diamond's beauty before making a purchase.

Choosing a natural 4 carat diamond involves a combination of personal preference and informed decision-making. By considering the 4Cs, focusing on GIA certification, and utilizing light performance images and videos, you can confidently select a natural 4 carat diamond that truly captures your heart and meets your expectations.

Lab-Grown 4 Carat Diamonds:

Lab-grown diamonds offer a captivating alternative to natural diamonds, with their sustainable and ethically sourced nature. When considering lab-grown 4 carat diamonds, the 4Cs—cut, color, clarity, and carat weight—remain essential factors to evaluate. Here are some key points to keep in mind when selecting a lab-grown 4 carat diamond:

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Cut: Opt for a well-cut lab-grown diamond to maximize its brilliance and ensure optimal light performance. Look for excellent or very good cut grades to ensure a beautiful and eye-catching diamond.

Color: Lab-grown diamonds exhibit a wide range of colors. Depending on your personal preference, you can choose from traditional white diamonds or explore fancy colored options. Aim for a color grade that suits your taste and desired appearance.

Clarity: Similar to natural diamonds, lab-grown diamonds can have varying clarity grades. Look for eye-clean diamonds, with clarity grades of VS2 (very slightly included) or higher, ensuring the absence of visible inclusions to the naked eye.

Carat Weight: A 4 carat lab-grown diamond offers a significant size and presence. Consider the carat weight alongside your preferences for the other 3Cs to find a lab-grown diamond that suits your desired appearance and budget.

Tips for Selection:

IGI Certification: The International Gemological Institute (IGI) is a leading authority in lab-grown diamond certification. When purchasing a lab-grown 4 carat diamond, prioritize those with IGI certification. However, it's worth noting that GIA certification is also highly reputable and recognized in the industry, providing an additional level of assurance.

Light Performance Evaluation: Request light performance images and videos for lab-grown diamonds you're considering. These visuals allow you to assess the diamond's brilliance, fire, and scintillation. Evaluating light performance aids in understanding the diamond's beauty and helps make an informed decision.

Lab-grown diamonds offer a sustainable and ethically conscious choice, often available at more accessible price points compared to natural diamonds. By considering the 4Cs, focusing on IGI certification, and evaluating light performance, you can confidently select a lab-grown 4 carat diamond that suits your preferences and aligns with your values.

4 Carat Diamond Settings:

Choosing the right setting for your 4 carat diamond is essential to enhance its beauty and ensure its security. Here are a few popular settings that can showcase the splendor of a 4 carat diamond:

Solitaire Setting: The solitaire setting is a classic and timeless choice, featuring a single diamond as the centerpiece. This setting allows the 4 carat diamond to take the spotlight, emphasizing its size and brilliance. Consider a sturdy prong setting with six or more prongs to securely hold the diamond in place.

Platinum Vatche U-113 6-Prong Solitaire "Tiffany Style" Engagement Ring

Platinum Vatche U-113 6-Prong Solitaire "Tiffany Style" Engagement Ring

Halo Setting: A halo setting features a center diamond surrounded by a halo of smaller accent diamonds. This setting adds extra sparkle and creates a striking visual impact, making the 4 carat diamond appear even larger and more radiant.

14K White Gold Pavé Halo And Shank Diamond Engagement Ring (Pear Center)

Three-Stone Setting: The three-stone setting showcases a 4 carat diamond flanked by two smaller diamonds on either side. This setting symbolizes the past, present, and future, while accentuating the size and beauty of the center stone.

Three Stone Princess Cut Pavé Diamond Engagement Ring

Three Stone Princess Cut Pavé Diamond Engagement Ring from Blue Nile

Side Stone Setting: Side stone settings incorporate additional diamonds or gemstones along the band of the ring, highlighting the 4 carat diamond with added sparkle and elegance. The choice of side stones can vary, ranging from smaller diamonds to colored gemstones for a unique and personalized touch.

Tips for Choosing a Setting:

Security: Given the size and value of a 4 carat diamond, it's crucial to select a setting that offers optimal security. Consider settings with more prongs, such as six or eight, to firmly hold the diamond in place and minimize the risk of damage or loss.

Complementary Metal: Choose a metal that complements the diamond and suits your personal style. Popular options include platinum, white gold, yellow gold, or rose gold. Each metal choice offers a distinct aesthetic appeal and durability.

Proportions and Balance: Consider the proportions and balance of the setting in relation to the size of the 4 carat diamond. Ensure the setting enhances the diamond's beauty without overwhelming it. A skilled jeweler can help you find the right balance between the diamond and the setting.

Ultimately, the choice of a 4 carat diamond setting should reflect your personal style and preferences while ensuring the security and beauty of the diamond. Take your time to explore different options, consult with a trusted jeweler, and try on various settings to find the perfect combination that truly showcases the magnificence of your 4 carat diamond.

Where to Buy 4 Carat Diamonds

When it comes to purchasing a 4 carat diamond, it's crucial to choose a reputable and trusted source. Here are some top options to consider:

✅ Whiteflash: Whiteflash is renowned for its exceptional quality and craftsmanship. They offer a wide range of natural 4 carat diamonds, with a standout collection known as A CUT ABOVE® diamonds. These diamonds undergo a rigorous selection process, ensuring superior cut quality and breathtaking beauty. Whiteflash also offers Precision Cut Lab Diamonds, a brand of lab-grown diamonds known for their precision and brilliance. With its designer settings and top-class customer service, Whiteflash has garnered numerous five-star reviews on platforms like Yelp and Google.

✅ James Allen: James Allen is a solid option for those seeking fancy-shaped and colored 4 carat diamonds. They have a vast inventory and provide 360-degree diamond imaging, allowing you to inspect each diamond closely before making a purchase. James Allen offers a range of settings to suit various styles and preferences.

✅ Blue Nile: Blue Nile is known for its extensive selection of diamonds, including 4 carat options. They offer a wide range of settings, allowing you to customize and create your ideal piece of jewelry. Blue Nile provides flexible payment options and financing plans, making the purchase process more accessible and convenient.

✅ Brilliant Earth: As a pioneer in ethically sourced and sustainable diamonds, Brilliant Earth offers an excellent selection of lab-grown 4 carat diamonds. Their lab diamonds undergo rigorous grading and certification processes, ensuring high-quality stones. Brilliant Earth also provides a variety of stylish settings, allowing you to create a unique and environmentally conscious piece.

When choosing a retailer, consider factors such as diamond quality, customer service, warranty options, and return policies. It's always recommended to read customer reviews and do thorough research to ensure a reliable and satisfying buying experience.

Remember, buying a 4 carat diamond is a significant investment, and selecting a reputable retailer ensures that you receive a high-quality diamond that meets your expectations and desires.

In conclusion, Whiteflash stands out as an excellent option, offering their exceptional A CUT ABOVE® natural diamonds and Precision Cut Lab Diamonds, along with designer settings and top-notch customer service. James Allen, Blue Nile, and Brilliant Earth are also reputable choices, each with its unique offerings and strengths.

Now that you have an understanding of where to buy 4 carat diamonds, you can embark on your journey to find the perfect diamond that will bring joy and beauty for a lifetime.