At Goenka Jewellers, we have spent years helping couples in Kolkata and Delhi find the ring they actually wanted, not the ring a salesperson pushed on them. This guide reflects that experience.
Why Lab-Grown Diamonds Are the 2026 Default
Lab-grown diamonds are real diamonds. They are chemically, physically, and optically identical to mined diamonds the same crystal structure, the same hardness, the same fire and brilliance under light. The only difference is origin.
Price. A certified 1 carat lab-grown solitaire costs a fraction of an equivalent mined diamond. The same budget either buys a significantly larger stone, a better quality stone, or leaves room for the wedding, the honeymoon, or the home.
Certification clarity. Reputable lab-grown diamonds are IGI certified with the same 4Cs grading as mined diamonds. There is no quality compromise.
Step 1: Set a Realistic Budget
- Entry-level (₹40,000 - ₹70,000): A beautifully cut 0.30ct to 0.50ct IGI-certified solitaire in 14K or 18K gold. Suitable for daily wear and a meaningful, elegant proposal piece.
- Mid-range (₹70,000 - ₹1,50,000): A 0.70ct - 2.00ct certified solitaire with strong colour and clarity. This is the sweet spot for most urban Indian couples in 2026.
- Premium (₹1,50,000 - ₹3,00,000): A 1.00ct to 3.50ct stone with excellent grading, or a fancy-shape design with side stones and a more elaborate setting.
- Luxury (₹3,00,000+): A 3.50ct+ centre stone, often with halo or three-stone designs in 18K gold.
Decide your number before you walk into a showroom. A clear budget protects you from upselling and helps the consultant guide you toward what actually fits — bigger stone with slightly lower colour, smaller stone with flawless clarity, or a design-led ring where the setting does the heavy lifting.
Step 2: Understand the 4Cs (Without Getting Overwhelmed)
The 4Cs Cut, Colour, Clarity, Carat - are the international grading standard for diamonds. Here is what actually matters for a buyer.
Cut
For an engagement ring, never go below Very Good. Excellent or Ideal cut is worth the small premium. This is where you do not compromise.
Colour
Diamonds are graded D (completely colourless) to Z (visibly yellow). For a white diamond engagement ring:
For most buyers, F or G is the right balance of beauty and budget.
Clarity
- VVS1–VVS2: Beautiful, premium, inclusions invisible without magnification.
- VS1–VS2: The most popular bridal zone. Inclusions invisible to the naked eye.
- SI1–SI2: Often eye-clean depending on the stone, much better value.
VVS2 is the practical choice for an engagement ring.
Carat
Carat is weight, not size. A 1.00ct round diamond is approximately 6.5mm wide. Two diamonds of the same carat weight can look different sizes depending on cut proportions.
Step 3: Pick the Diamond Shape
The shape is the most visible part of the ring. It defines the entire look.
- Round Brilliant The most popular shape worldwide. Maximum sparkle, timeless design, the safest choice if you are unsure of taste.
- Oval The biggest engagement ring trend of 2026 in India.
- Cushion Soft, romantic, vintage feel. Pairs beautifully with halo settings.
- Emerald Long, rectangular, art-deco elegance.
- Pear Distinctive and elegant, it elongates the finger like an oval.
- Princess Square with sharp corners. Modern, geometric, slightly less trendy in 2026 than a few years ago.
- Marquise Long, pointed oval. Dramatic and bold, less common.
Step 4: Choose the Setting
The setting is the metalwork that holds the diamond. It defines the personality of the ring as much as the stone does.
- Solitaire (single stone): The classic.
- Hidden Halo: A 2026 favourite.
- Halo: Small diamonds encircle the centre stone, making it appear larger and adding sparkle. Great for maximising visual impact on a smaller centre stone.
- Three-Stone (Trilogy): Three diamonds representing past, present, and future. A meaningful narrative built into the design.
- Toi-et-Moi: Two stones set side by side, often two different shapes. A growing trend in 2026 for couples who want something more personal than a solitaire.
- Bezel: A thin metal rim wraps fully around the diamond.
- Pavé Band: Tiny diamonds set along the band itself.
Match the setting to your partner's lifestyle. A pavé halo is stunning but needs more care. A bezel-set solitaire survives daily wear, gym sessions, and travel without complaint.
Step 5: Demand Proper Certification
Before you buy, ask to see:
- The IGI certificate for the centre stone.
- The BIS hallmark on the gold or platinum band.
- A detailed invoice listing the diamond's specs, metal weight, and price breakdown.
- The store's exchange, buyback, and lifetime upgrade policies in writing.
At Goenka Jewellers, every lab-grown diamond is IGI certified, every band is BIS hallmarked, and every ring comes with our lifetime exchange and certified buyback policies.
Step 6: Get the Ring Size Right (Without Spoiling the Surprise)
The average women's ring size in India is around 11-14 for the ring finger.
Ways to find the size discreetly:
- Borrow a ring she already wears on the same finger and bring it to the showroom.
- Trace the inside of a borrowed ring on paper.
- Ask her sister, best friend, or mother, they often know.
At Goenka Jewellers, we offer complimentary resizing within the first year on most designs, so a small size mismatch is not the end of the world.
Common Mistakes to Avoid
After years of helping couples through this decision, these are the mistakes we see most often:
- Buying for carat weight alone. A 1.00ct stone with poor cut looks worse than a 0.80ct stone with excellent cut. Cut first, carat second.
- Skipping certification to save money. An uncertified diamond at any price is a gamble. Walk away.
- Choosing a setting that does not match the lifestyle. A high prong-set solitaire on someone who does manual work daily is a recipe for damage.
- Buying online without seeing the ring. Photos can flatter a diamond that looks ordinary in person. For a purchase this significant, always view in person.
- Ignoring the band thickness. A thin band makes the centre stone look bigger. A thick band looks more substantial but can dwarf a smaller diamond.
Why Choose Goenka Jewellers
We do one thing, and we do it well: certified lab-grown diamond jewellery for Indian couples who want the best stone their budget can buy.
- Every diamond IGI certified. No exceptions, no asterisks.
- Every band BIS hallmarked. Verified, not just claimed.
- Lifetime exchange and certified buyback. The ring you buy from us has a clear future value, and we offer 80% cash buyback gurantee.
- Transparent pricing. You see the diamond grade, the metal weight, and the making charges separately. No mystery, no markup games.
- Two showrooms - Kolkata and Delhi. Personal consultation, video call consultation, no pressure, no commission-driven salesmanship.
We treat the engagement ring purchase the way it deserves to be treated as the start of something serious and committed, not a transaction.
Visit Us in Kolkata or Delhi
The best way to choose an engagement ring is in person, though we have video calling facility. Book a consultation at our Kolkata or Delhi showroom and we will walk you through certified options across every shape, setting, and budget without any pressure to decide on the same day.
Frequently Asked Questions
Are lab-grown diamonds real diamonds? Yes. Chemically, physically, and optically identical to mined diamonds. The only difference is origin.
How much cheaper are lab-grown engagement rings in India? A certified lab-grown diamond typically costs significantly less than a mined diamond of equivalent grade. The exact gap depends on size and quality, but the savings let you go either bigger, better, or save the difference.
Do lab-grown diamonds lose their sparkle over time? No. Diamond is the hardest natural substance known. With basic care, the sparkle lasts a lifetime.
Can lab-grown diamond rings be resized? Yes, the band can be resized. At Goenka Jewellers, complimentary resizing is included within the first year.
What is the right carat size for an Indian engagement ring in 2026? The 1.00ct mark is the most aspirational, but 1.70ct to 2.90ct stones are extremely popular and offer significantly better value. Choose the shape and size of diamond by what looks right on the hand.
Is the resale value of lab-grown diamonds good? The resale market for lab-grown diamonds in India is still developing. Lab-grown diamonds are best bought for personal use, engagement, and gifting and not as financial investments. Our certified buyback policy gives you a clear 80% cash Buyback value pathway if you ever need it.
Do you offer customisation? Yes. We design and customise rings to your specifications at both our Kolkata and Delhi showrooms.
Ready to begin? Visit us at our Kolkata or Delhi showroom, or explore our certified lab-grown engagement ring collection online.
The right ring is waiting. Let us help you find it.