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Customised Lab-Grown Diamond Engagement Rings, Designed Around Your Story

At Reia, a custom engagement ring begins with your story, not a stock tray. Whether you've pictured the ring for years or you're designing it together, our in-house team helps you shape a customised lab-grown diamond engagement ring that belongs to one person and one moment, then hand-finishes it in certified diamonds and hallmarked gold.

You bring the idea, even a rough sketch, or a saved Pinterest image. We handle the diamond, the design and the craft. What you receive is an engagement ring that looks, wears and lasts exactly like fine jewellery should, because that's precisely what it is.

Browse The Aisle engagement edit for inspiration, explore over 200 engagement ring designs, or book a demo and design a ring that doesn't exist yet.

How Reia's Custom Engagement Ring Process Works

We keep the process transparent and collaborative, from your first idea to the final polish. Our custom ring process includes:

1. Consultation: Share your vision, inspiration, budget, and timeline with a Reia designer, online or in-store. Our experts help tailor the design to your style, preferences, and budget.
   
2. Quotation: Within 24 hours of your consultation, you'll receive transparent pricing and available payment options, so you know what to expect before moving forward.
   
3. CAD render: Your design is transformed into a detailed 3D CAD visual, allowing you to review the proportions, details, and overall look before production begins. Revisions can be made until you're happy with the design.
   
4. Wax model: For custom rings, we can create a wax model of the approved design so you can get a physical sense of the ring's shape and proportions before it is crafted. This wax-model stage applies to rings only and is not available for other custom jewellery categories.
   
5. Handcrafting & delivery: Once you give final approval, we begin production. Your ring is then hand-finished and delivered, with many custom ring orders completed in as little as 7 days and covered by a lifetime warranty.
   

Ready when you are: book a design consultation or message our team on WhatsApp.

What You Can Customise on Your Engagement Ring

Some love stories deserve a ring you can't buy off the shelf. With Reia, you control every meaningful detail:

• Diamond shape: round, princess, emerald, marquise, pear, heart, oval, cushion, Asscher or radiant
  
• Carat weight & clarity: subtle everyday grace or a striking centre stone, tuned to your taste and budget
  
• Gold tone: yellow, white or rose gold
  
• Setting style: solitaire, halo, hidden halo, three-stone, pavé, vintage-inspired  and more
  
• Coloured diamonds: choose a blue, yellow, pink or green centre stone from our Chromatique collection
  
• Personal touches: engravings, initials, meaningful dates or a birthstone accent
  

This is where personalised engagement rings earn their meaning: an engraved date inside the band, hidden initials, or a setting that nods to a family heirloom. Every ring is reviewed by our in-house design experts before it's carefully hand-finished into a wearable heirloom.

Choosing Your Diamond: The 4Cs, Made Simple 

Every lab-grown diamond is graded on the same four criteria as a mined diamond: cut, colour, clarity and carat by independent laboratories such as IGI. Understanding them helps you spend where it shows and save where it doesn't:

• Cut: prioritise this first. Cut controls how a diamond handles light, which is what actually makes it sparkle. A well-cut stone outshines a higher-graded but poorly cut one in every real-world light. For a round diamond, look for an Excellent or Ideal cut grade; fancy shapes such as oval or emerald aren't cut-graded the same way, so judge them by eye or on video.
  
• Colour: aim for the sweet spot. Grades run from D (colourless) to Z. For most rings, a colour in the D–G range appears white to the naked eye, especially once set. A warmer gold band can also let you drop a grade or two without any visible tint.
  
• Clarity: "eye-clean" is the goal. You want a stone with no inclusions visible to the unaided eye. VVS1–VVS2grades meet that standard the vast majority of the time and are the practical choice for most buyers; you rarely need to pay for flawless.
  
• Carat: balance the size with the other three. Carat is weight, not size. Because lab-grown diamonds cost significantly less than mined stones of the same grade, most couples can comfortably choose a larger centre stone, but a beautifully cut, eye-clean 1-carat will always outshine a dull 1.5-carat. One tip: prices step up at round milestones (1.00ct vs 0.90ct), so a marginally smaller stone can stretch your budget with no visible difference.
  

Not sure how to balance them for your budget? That's exactly what your design consultation is for. Book a demo, and we'll walk you through real options on screen.

Finding Your Setting Style

The setting is the second most important decision after the diamond itself; it shapes both the character of the ring and how it holds up to daily wear. The most popular styles we craft:

• Solitaire: a single diamond on a clean band. The most timeless, versatile choice, and it pairs beautifully with a wedding band later. Explore solitaire engagement rings.
  
• Halo: a ring of smaller diamonds around the centre stone, making it look larger and adding sparkle for the money. A great way to maximise visual presence.
  
• Hidden halo: the same brilliance from the side profile, but clean and solitaire-like from above; a modern favourite.
  
• Three-stone: a centre stone flanked by two side stones, often read as past, present and future. Symbolic and full of presence.
  
• Pavé: small diamonds set along the band for continuous sparkle that frames the centre stone.
  

A practical note on lifestyle: if you work a lot with your hands, a lower-profile setting or a securely built halo tends to snag less than a tall solitaire, and a warmer metal can make a near-colourless stone look even whiter. We'll help you match the setting to how you actually live. For sculptural and statement designs, see our designer engagement rings.

Picking a Diamond Shape

Shape is the first thing people notice, and it changes how large a stone looks:

• Round brilliant: the classic; maximum fire and the safest, timeless choice.
  
• Oval, pear & marquise: elongated shapes that look larger than a round of the same carat weight, and flatter the finger.
  
• Emerald & Asscher: clean, linear facets and a calm, vintage Art Deco elegance rather than fiery sparkle; explore our emerald-cut engagement rings.
  
• Princess, cushion & radiant: modern square and cushioned cuts with plenty of brilliance.
  

For statement shapes, emerald, marquise and pear, explore every hue in the Colour collection. When you customise, you choose the exact shape and millimetre size, so the ring is proportioned to the hand it's made for.

Why a Customised Lab-Grown Diamond Engagement Ring

Choosing to customise means the ring is shaped around your partner, not around whatever sits in a display case. A customised lab-grown diamond engagement ring also stretches your budget further: because lab-grown diamonds cost meaningfully less than mined diamonds of comparable size and quality, that saved value can go into a larger centre stone, a finer setting, or simply staying comfortably within budget with no compromise on brilliance or certification.

Every Reia engagement ring is:

• Handcrafted with certified diamonds; each lab-grown diamond is IGI- or SDI-certified for cut, colour, clarity, carat, and origin
  
• Set in BIS-hallmarked gold, independently assayed for purity under India's mandatory hallmarking system
  
• Made by skilled artisans, hand-finished by craftspeople using techniques refined over generations
  
• Designed for real life, comfortable and built for daily wear, not just the proposal
  
• Ethically and transparently made, with clear pricing, documented sourcing, and with no environmental footprint of mining
  

Certified, Transparent and Guaranteed

Every custom engagement ring from Reia arrives with genuine peace of mind:

• IGI or SDI certification verifying the diamond's cut, clarity, carat, and origin
  
• BIS-hallmarked gold with a unique HUID, guaranteeing purity
  
• Transparent pricing, sourcing and materials, no hidden markups
  
• Elegant packaging with the certificate and care instructions included
  

To the naked eye, your lab-grown diamond is indistinguishable from a mined one because chemically, physically, and optically, it is a diamond. Only the origin and the price are different.

Pairing Your Engagement Ring With a Wedding Band 

If you already know a wedding band will follow, it's worth thinking about the pairing while you design. Some settings, like a low solitaire or a flush band, sit perfectly flat against a wedding ring, while taller halos may need a contoured or shaped band to nest neatly. Because we design your engagement ring from scratch, we can plan for that fit from the start, and craft a matching wedding band later so the two pieces sit together as one. Just mention it during your consultation.

A Ring That Evolves With You

Your story keeps growing, and your ring can keep pace. With Reia, you can redesign or upgrade over time, move from a half-carat to a one-carat centre stone, or switch metal tone and setting as your taste changes. And because value should stay in your hands, Our lifetime exchange and buyback policy gives you flexibility if you decide to change your jewellery later. For diamonds, Reia offers 70% of the diamond value under the buyback option, while exchange is available at 100% of the diamond value. Frequent buyers can also access making-charge savings through the Reia Carat Club. 

Lifetime Aftercare

Our relationship doesn't end at the proposal. Every Reia ring is cared for, for life:

• Ultrasonic cleaning and polishing
  
• Free resizing within 30 days of purchase
  
• Personal support over WhatsApp or in-store
  

A little home care goes a long way too: a soft brush, warm water and mild soap keep a lab-grown diamond brilliant between professional cleanings, and an occasional prong check ensures your centre stone stays secure for a lifetime of daily wear.

Beyond Engagement Rings

While custom engagement rings are our speciality, Reia's design service doesn't end there. Talk to us about customising:

• Custom wedding bands to sit alongside your engagement ring
  
• Necklaces and pendants featuring charms, initials or other symbols
  
• Earrings: studs, drops and chandelier styles
  
• Bangles and bracelets, simple or bold
  
• Custom gemstone and diamond combinations: fun colour or timeless sparkle
  

Whatever the piece, the process is the same: share your idea, approve the CAD render, and receive it in certified diamonds and hallmarked gold.

Design Yours

Some rings are meant to be made, not bought. Share your idea, see it rendered in 3D, review a wax model of your custom ring, and let our team craft it in certified lab-grown diamonds and hallmarked gold. 

Book your custom design consultation → or call +91 63605 80124.

Prefer to browse first? Visit a Reia store in Bengaluru, Coimbatore, or Guwahati, or explore all locations.

FAQ Section

Q.1 How do I design a custom engagement ring at Reia? 

Book a design consultation, share your vision or a reference image, and choose your diamond, setting, gold tone, and personal details. You’ll review a 3D CAD render and, for custom rings, a wax model before your design is approved for handcrafting in certified lab-grown diamonds and hallmarked gold. Your finished ring is then delivered with a lifetime warranty. You can start online or at any Reia store. 

Q.2 How long does a customised lab-grown diamond engagement ring take to make? 

Many custom engagement rings at Reia are delivered in as little as 7 days after you approve the final design, though timelines vary with the complexity of the ring. Your estimated delivery date is confirmed before you place the order.

Q.3 How much does a customised lab-grown diamond engagement ring cost? 

The price depends on the diamond size and quality, the gold weight and the design, so each ring is quoted individually. Because lab-grown diamonds cost significantly less than mined diamonds of comparable size and quality, a customised lab-grown diamond engagement ring lets you choose a larger or higher-quality centre stone within the same budget. You receive a transparent quotation within 24 hours of your consultation.

Q.4 Can I turn a Pinterest photo or my own sketch into an engagement ring? 

Yes. A rough idea, a saved image or a reference photo is all our design team needs to begin. We translate it into a 3D CAD model you can refine before your ring is crafted.

Q.5 What can I personalise on the ring? 

Personalised engagement rings at Reia can include an engraved date or message, hidden initials, a birthstone accent, and your choice of diamond shape, setting and gold tone. Every detail is confirmed on the CAD render before crafting begins.

Q.6 Which of the 4Cs matters most for an engagement ring?  

Cut matters most because it controls how much a diamond sparkles; a well-cut stone outperforms a higher-graded but poorly cut one. For most buyers, a diamond graded D–G in colour with VS1–VS2 clarity looks white and eye-clean, letting you put more of your budget toward cut and carat.

Q.7 What is the best setting for a lab-grown diamond engagement ring? 

There is no single best setting; it depends on your style and lifestyle. A solitaire is the most timeless and versatile; a halo maximises sparkle and apparent size, a hidden halo keeps a clean look from above, and a three-stone setting adds symbolism and presence. If you're often hands-on, a lower-profile or securely built setting tends to wear best.

Q.8 Which diamond shape looks the biggest? 

Elongated shapes such as oval, pear and marquise generally look larger than a round diamond of the same carat weight because they spread across more surface area. Round brilliants offer the most fire, while emerald and Asscher cuts give a calmer, vintage elegance.

Q.9 Can I design a matching wedding band, too? 

Yes. Because your engagement ring is designed from scratch, we can plan the fit with a future wedding band in mind and craft a matching or contoured band so the two sit together neatly. Mention it during your consultation.

Q.10 Are lab-grown diamond engagement rings real diamonds? 

Yes. Lab-grown diamonds are chemically, physically and optically identical to mined diamonds, and since 2018, the U.S. Federal Trade Commission has formally recognised them as diamonds. The only differences are how they're created and their price.

Q.11 Are lab-grown diamonds durable enough for an everyday engagement ring? 

Yes. Lab-grown diamonds score 10 on the Mohs hardness scale,e the same as mined diamonds and the hardest of any natural material, so they resist scratching and are ideal for a ring worn every day.

Q.12 What certification comes with a Reia engagement ring? 

Every Reia lab-grown diamond is IGI- or SDI-certified for cut, colour, clarity, carat and origin, and the gold is BIS-hallmarked with a unique HUID confirming its purity. Your certificate and care instructions are included with the ring.

Q.13 What's the difference between CVD and HPHT lab-grown diamonds? 

Both are methods of growing real diamonds: CVD (Chemical Vapour Deposition) builds a diamond layer by layer from carbon-rich gas, while HPHT (High Pressure High Temperature) recreates the heat and pressure found deep in the earth. Both produce diamonds with identical properties to mined stones.

Q.14 Where can I design a custom engagement ring near me? 

Reia offers custom engagement ring design online across India and in person at its stores in Bengaluru (Jayanagar, Dickenson Road, and HSR), Coimbatore (RS Puram and Cross Cut Road), and Guwahati (Fancy Bazaar). You can book a consultation at any location or start the process online.