How to Choose a Lab Grown Diamond Ring

Choosing a lab grown diamond ring comes down to finding the right balance of diamond quality, size, design and budget. Compare the 4Cs (cut, colour, clarity and carat), then consider the diamond shape, ring setting and gold purity to find a ring that matches your style and how you plan to wear it. Before buying, check the diamond's grading report and the gold hallmark so you know what you're paying for.

Here are the key factors to consider when choosing a lab grown diamond ring:

1. Understand the 4Cs of a Lab Grown Diamond

When choosing a lab grown diamond ring, the 4Cs help you compare the centre diamond's sparkle, colour, clarity and size. The 4Cs of diamond quality are cut, colour, clarity and carat. Understanding these factors makes it easier to compare different rings, evaluate their specifications and decide which qualities matter most to you.

Cut: Diamond Sparkle

Cut affects how well a lab grown diamond reflects light, influencing its brightness and sparkle. For round brilliant diamonds, cut grades generally range from Excellent to Poor, depending on the grading system. A well-cut diamond can look brighter than another stone with similar carat, colour and clarity.

Remember, cut and shape are different. Round, oval and pear describe a diamond's shape, while cut refers to its proportions and finish. Check the cut grade where available, along with the diamond's actual appearance.

Colour: Diamond Whiteness

Lab grown white diamonds are graded from D to Z. D, E and F are colourless, while G to J are near-colourless. Lower grades show increasingly noticeable colour.

If you prefer a crisp, colourless appearance for your ring, D, E or F may suit you. However, differences between neighbouring grades can be subtle, so consider the diamond's appearance, shape and setting before paying more for a higher grade.

Clarity: Diamond Purity

Clarity describes inclusions inside a lab grown diamond and blemishes on its surface. Grades range from FL (Flawless) and IF (Internally Flawless) through VVS, VS and SI to Included.

• FL and IF: No inclusions are visible under 10× magnification; IF diamonds may have surface blemishes.

• VVS1 and VVS2: Inclusions are extremely difficult to see under 10× magnification.

• VS1 and VS2: Minor inclusions are more noticeable under magnification.

• SI and Included grades: Inclusions are easier to detect and may be visible to the naked eye, depending on the stone.

You don't necessarily need a flawless lab grown diamond for your ring. VVS clarity offers very high clarity grades, but consider the actual diamond's appearance rather than choosing by grade alone.

Carat: Diamond Weight and Size

Carat measures a lab grown diamond's weight, not its exact visible size. One carat equals 200 milligrams, and two diamonds of the same weight can look different because of their shape and proportions.

For example, an oval diamond may appear more elongated than a round diamond of the same carat weight. When comparing lab grown diamond rings, check the diamond's measurements in millimetres as well as its carat weight to understand how large it may look when worn.

How to Prioritise the 4Cs

Prioritise cut if sparkle matters most, colour if you prefer a colourless appearance, and clarity based on the visibility of inclusions. If size is your priority, compare carat weight with the diamond's measurements. The best lab grown diamond ring is one whose combination of qualities, appearance and price suits your preferences and budget.

2. Choose a Diamond Shape That Suits Your Style

The shape of a lab grown diamond influences how your ring looks, from its overall style to how large the centre stone appears. The right choice depends on whether you prefer a classic, elongated, modern or distinctive design. Keep in mind that diamond shape is different from cut quality: shape describes the outline, while cut affects how the diamond handles light.

Which shape looks biggest? Oval and other elongated shapes can cover more length across the finger for their carat weight, but actual face-up measurements and proportions matter. Compare dimensions in millimetres alongside carat weight rather than assuming all diamonds of the same weight will look equally large.

3. Choose the Right Carat Size for Your Ring

Carat refers to a diamond's weight, not its exact visible size. When choosing a lab grown diamond ring, the right carat depends on how prominent you want the centre stone to look, your preferred design and your budget.

• 1 Carat: A good starting point if you want a noticeable centre diamond without an overly bold look. It works well for solitaire and everyday ring designs.

• 2 Carat: A larger centre stone that creates more visual impact and suits those who want the diamond to stand out.

• 3 Carat: A statement size for those who prefer a more prominent centre diamond. The setting and proportions become especially important for the ring's overall appearance and comfort.

One advantage of choosing a lab grown diamond for your ring is that it can make a larger carat size more accessible within the same budget compared with a comparable natural diamond. This gives you more flexibility to choose a bigger centre stone without necessarily increasing your spending.

Keep in mind that two diamonds of the same carat weight can look different depending on their shape and measurements. Compare the dimensions in millimetres and consider how the setting affects the overall appearance. Ultimately, choose a carat size that gives you the look you want while staying within your budget.

4. Choose a Ring Setting That Complements Your Diamond

The setting determines how your lab grown diamond sits in the ring, how much of it is visible and how the overall design looks on your finger. Some settings keep the focus on the centre diamond, while others add sparkle, make the ring look more elaborate or create a distinctive style.

• Solitaire Setting: Features a single centre diamond without surrounding stones, making it ideal if you want the diamond to stand out. It works particularly well when you want to showcase the size, shape and sparkle of your lab grown diamond.
• Halo Setting: Surrounds the centre diamond with smaller diamonds, creating extra sparkle and a fuller appearance. It's worth considering if you want your ring to look more prominent without relying entirely on a larger centre stone.
• Three-Stone Setting: Places two smaller diamonds on either side of the centre stone. This creates a wider, more detailed look and draws attention to the centre diamond while adding sparkle across the ring.
• Pavé Setting: Features small diamonds set closely along the band, giving the ring sparkle beyond the centre stone. It's a good option if you prefer an embellished design rather than a plain gold band.
• Bezel Setting: Uses a rim of metal around the diamond's edge, creating a clean, contemporary appearance. The surrounding metal can help protect the diamond's edges, making this a practical option if you prefer a smoother profile with fewer exposed edges.

When choosing a setting, consider what you want the finished ring to look like. A solitaire highlights the centre diamond, a halo adds fullness, and pavé or three-stone designs bring more sparkle across the ring. Your choice should complement the diamond's shape and size while matching your personal style and how you plan to wear it.

Choose the Right Gold Purity and Colour

When choosing a lab grown diamond ring, gold purity affects the ring's gold content, appearance and price. Look for BIS-hallmarked gold jewellery to verify its stated purity, then choose the gold colour and karat that suit your style and budget.

• 9K Gold: Contains 37.5% pure gold. It can be a more budget-friendly option, depending on the alloy and design.
• 14K Gold: Contains 58.5% pure gold, offering a balance of gold content, durability and cost.
• 18K Gold: Contains 75% pure gold and is often preferred for fine jewellery because of its higher gold content. It generally costs more than a comparable 14K or 9K ring.

You can also choose a gold colour to complement your diamond and personal style:

• Yellow Gold: Creates a warm, classic look and contrasts beautifully with a colourless diamond.
• White Gold: Offers a bright, silvery appearance that pairs well with colourless lab grown diamonds.
• Rose Gold: Has a soft pink hue that gives the ring a distinctive, romantic appearance.

Check the Diamond Certification Before Buying

When buying a lab grown diamond ring, an independent grading report helps you confirm that the diamond is laboratory-grown and understand its quality. Reports from recognised gemological laboratories such as IGI and GIA document important characteristics of the stone, helping you compare what different sellers offer. 

Before purchasing, check these details:

• Lab-grown origin: Make sure the report explicitly identifies the stone as laboratory-grown. This distinguishes it from a natural diamond and from simulants such as cubic zirconia or moissanite.

• The 4Cs: Match the report's carat weight, colour, clarity and cut information, where provided, with the seller's product description.

• Measurements and shape: Check the dimensions in millimetres and the stated shape to ensure the report corresponds to the diamond you're buying.

• Report number: Enter the number on the issuing laboratory's official website, such as IGI Report Verification or GIA Report Check. Confirm that the online record matches the report and stone.

• Laser inscription: Many graded diamonds have a report number and/or laboratory-grown identification laser-inscribed on the diamond's girdle. Ask whether the stone has one and whether it matches the report. The inscription is a useful cross-check, not a substitute for report verification. 

One important distinction: diamond certification and gold hallmarking are not the same. A diamond grading report documents the stone's characteristics, while a BIS hallmark verifies the declared purity of gold jewellery. In India, you can check a hallmarked item's six-character alphanumeric HUID using the BIS Care app.

Choose a Lab Grown Diamond Ring for the Occasion

The occasion can help you decide which ring style to choose, from a traditional design for weddings to a bold cocktail ring for parties. Consider the wearer's personal style, how often the ring will be worn and the look you want the diamond to create.

• Engagement Rings: Solitaire, halo and three-stone rings are popular choices when you want the centre diamond to stand out. Lab grown diamonds can make a larger centre stone more accessible within your budget.
• Wedding and Festive Occasions: Vanki rings, with their traditional curved or V-shaped designs, can complement ethnic outfits and bridal jewellery. Look for a design that balances the diamond detailing with the overall look of the ring.
• Parties and Special Events: Cocktail rings often feature a prominent centre stone, distinctive shapes or elaborate settings. They suit buyers looking for a statement piece that stands out with occasion wear.
• Anniversaries and Milestone Gifts: Classic solitaires, three-stone rings or diamond bands can make meaningful gifts. Choose a style that reflects the recipient's taste, whether they prefer understated jewellery or a more detailed design.
• Everyday Wear: Minimal solitaires and simpler diamond bands are practical options for regular use. Consider a comfortable fit and a secure, lower-profile setting that is less likely to catch on clothing.

What to Check Before Buying a Lab Grown Diamond Ring

Before purchasing a lab grown diamond ring, check the diamond's specifications, gold purity, fit and purchase policies. These details help you understand exactly what you're buying and avoid surprises after delivery.

• Diamond specifications: Confirm the carat weight, colour, clarity, shape and available cut information match the product description.

• Diamond certification: Verify the grading report number and ensure the report identifies the stone as laboratory-grown.

• Gold purity: Check the stated gold karat and applicable BIS hallmark details.

• Ring size and fit: Confirm your ring size and check whether resizing is available, along with any associated charges.

• Return and exchange policy: Read the return window, eligibility conditions and any exclusions before ordering.

• Warranty and after-sales service: Understand what's covered for repairs, loose settings and other issues, and whether routine maintenance is available.

• Final price and delivery: Confirm the total payable amount, delivery timeline and any additional charges before completing the purchase.

The key is to verify the details before paying, not after the ring arrives. A clear grading report, accurate product specifications and transparent purchase policies help you make a more confident decision.

If you're looking for a reliable place to buy lab grown diamond rings, ONYA brings together a wide range of designs, certified diamonds and a convenient buying experience. You can explore our collection online or visit our physical stores to see the jewellery in person and find a ring that suits your style and budget.

With IGI-certified lab grown diamonds, BIS-hallmarked gold options and clear product specifications, you can make an informed choice without compromising on quality. ONYA also offers a 15-day return policy, 100% lifetime exchange and 80% lifetime buyback, subject to the applicable terms and conditions.

Explore ONYA's lab grown diamond ring to discover designs for engagements, everyday wear, weddings and special occasions. You can shop online or visit ONYA stores in Bengaluru, Pune and Hyderabad for an in-person experience.

Frequently Asked Questions

What is the best carat size for a lab grown diamond ring?

The best carat size depends on your preferred look and budget. A 1-carat diamond offers a noticeable centre stone, while 2-carat and 3-carat diamonds create more visual impact. Compare the diamond's measurements as well as its carat weight, since shape and proportions affect how large it looks.

Which colour grade is best for a lab grown diamond ring?

D, E and F are colourless grades and suit buyers who prefer a diamond with minimal visible colour. G to J are near-colourless and may also look appealing, depending on the stone and setting. Compare the diamond's actual appearance before paying more for a higher colour grade.

Is VVS clarity necessary for a lab grown diamond ring?

No. VVS1 and VVS2 are high clarity grades, with inclusions that are extremely difficult to see under 10× magnification. Lower grades may also look clean to the naked eye, depending on the individual diamond. Consider the visible appearance and price rather than choosing by clarity grade alone.

How can I verify a lab grown diamond certificate?

Check that the report identifies the stone as laboratory-grown, then match its carat weight, colour, clarity, shape and measurements with the product details. Verify the report number through the issuing laboratory's official website, such as IGI or GIA.

Is 14K or 18K gold better for a lab grown diamond ring?

14K gold contains 58.5% pure gold, while 18K contains 75%. Both can be suitable for rings; the right choice depends on your budget, preferred gold content and design. Also check the stated purity and applicable BIS hallmark details before buying.

Are lab grown diamond rings more affordable than natural diamond rings?

Generally, comparable lab grown diamonds cost less than natural diamonds, which can make a larger carat size or a different design more accessible within the same budget. Actual prices vary with diamond specifications, gold weight, setting and retailer.