The engagement ring decision that actually matters is not "how many carats". It is cut first, then shape, then setting, then carat, then colour and clarity last. Get the order right and a ₹60,000 ring can look more expensive than a lakh-rupee one. Get it backwards, chase carat first, and you will overpay for size while underpaying for sparkle.
That is the whole guide in two sentences. Everything below is us walking you through each decision, in that order, with real prices from our own counter.
We say this after years of watching two kinds of customers walk into our Camac Street store: the ones who know exactly what they want, and the ones who have read fifteen articles and are more confused than when they started. This guide is written for the second kind. No fluff, no "diamonds are forever" poetry, just the order to make decisions in, and what each one actually costs.
Step 1: decide on cut before anything else
Cut is how well a diamond's facets are angled to bounce light back at you. It is the single biggest driver of how much a ring sparkles, more than colour, more than clarity, more than carat.
Here is why we put it first. A poorly cut 1 carat diamond can look duller than a beautifully cut 0.80 carat diamond. Nobody at the proposal, the sangeet, the home, or the office desk is going to notice the missing 0.20 carats. Everyone will notice whether the ring catches light.
What to ask for: Excellent cut, full stop. On a round brilliant, that means the certificate should read Excellent for cut, polish and symmetry, which jewellers call "triple EX". Never go below Very Good on an engagement ring. With lab grown pricing this is affordable at almost every budget, so there is no reason to compromise here.
Step 2: pick the diamond shape
Shape is a style decision, not a quality one, but it changes the whole character of the ring, and it changes price per carat too.
Round brilliant: the classic. Maximum brilliance, timeless, and the easiest to resell or reset later. It costs more per carat than other shapes in the open market because more rough diamond is cut away to achieve the round shape. At Goenka Jewellers, every shape and size from 1 carat to 8 carats is priced at a flat ₹25,000 per carat at our recommended grade.
Oval: visually larger than its actual carat weight because of its elongated shape, and the biggest engagement ring trend in India right now for exactly that reason. Watch for the bow-tie effect, a shadow across the centre, which shows up more in poorly cut ovals.
Cushion and princess: soft-cornered square and hard-cornered square respectively. Both read as substantial on the hand and work beautifully with halo settings. Cushion has a vintage, romantic feel; princess is more geometric and modern.
Pear and marquise: elongated and elegant, and both flatter the finger the way an oval does. Less common, which is precisely why some brides want them.
Emerald: step-cut facets instead of brilliant-cut, giving a "hall of mirrors" look rather than fire and scintillation. A different kind of beautiful, quieter and more architectural. It shows inclusions more visibly than other shapes, so clarity matters more here than elsewhere.
Browse our lab grown diamond ring collection to see these shapes side by side.
Step 3: 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, and it decides how well the ring survives ordinary life.
Solitaire: one diamond, minimal metal. The purest expression of "this stone is the point". Also the easiest to keep clean and the least likely to snag.
Halo: a ring of smaller diamonds circling the centre stone. Makes the centre stone look meaningfully larger and adds overall sparkle. It is the single best setting for maximising visual size on a moderate carat budget.
Hidden halo: the same idea, but the accent diamonds sit under the centre stone rather than around it, visible from the side and not from above. A 2026 favourite for buyers who want the lift without the wider look.
Three-stone, or trilogy: a centre stone flanked by two smaller ones, often read as past, present and future. More diamond weight overall, and a fuller look across the hand.
Toi-et-moi: two stones set side by side, often in two different shapes. A growing choice for couples who want something more personal than a solitaire.
Bezel: metal fully or partly wraps the stone's edge. The most secure, snag-resistant setting there is, and a genuinely smart pick for anyone with an active daily routine of cooking, gym and small children.
Pavé or eternity band: smaller diamonds set along the band itself. Adds sparkle from every angle, at a lower cost per unit of visual impact than increasing the centre stone.
Match the setting to your partner's lifestyle, not to a photograph. A pavé halo is stunning but needs more care. A bezel-set solitaire survives daily wear, gym sessions and travel without complaint.
Step 4: now decide carat, with the budget arithmetic that actually matters
Carat is weight, not size. A 1.00 carat round diamond is roughly 6.5mm across, and two diamonds of identical carat weight can look different sizes depending on cut proportions.
Price jumps sharply at round numbers, 0.50 ct, 1.00 ct, 2.00 ct, because demand clusters there. A 0.90 ct diamond can cost noticeably less than a 1.00 ct while looking nearly identical set in a ring, especially in a halo that visually rounds up the centre stone anyway.
This is where lab grown diamonds change the entire calculation. A quality 1 carat lab grown stone runs roughly ₹25,000 for the loose diamond at our recommended grade, a fraction of a comparable natural stone. The carat weight that once demanded a natural-diamond budget of several lakhs becomes realistic at a fraction of the spend, which frees up money for the cut and setting decisions above instead of forcing a trade-off.
What a finished ring costs, by band
These are complete rings: stone, gold and making.
- ₹40,000 to ₹70,000: a beautifully cut 0.30 to 0.50 ct IGI certified solitaire or halo in 14K or 18K gold. Suitable for daily wear and a genuinely elegant proposal piece.
- ₹70,000 to ₹1,50,000: a 0.70 to 2.00 ct certified solitaire with strong colour and clarity. This is the sweet spot for most urban Indian couples in 2026.
- ₹1,50,000 to ₹3,00,000: a 1.00 to 3.50 ct stone with excellent grading, or a fancy shape with side stones and a more elaborate setting.
- ₹3,00,000 and above: a 3.50 ct or larger centre stone, usually in 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: a bigger stone with slightly lower colour, a smaller stone with flawless clarity, or a design-led ring where the setting does the heavy lifting.
The metal you choose moves this number too. A 9 karat setting costs close to half what an 18 karat setting costs in gold, which is money that can go into carat weight instead. Our guide to 9K gold purity and price in India works through that arithmetic.
Step 5: colour and clarity last, where most people overspend
These matter, but least of the four Cs to your eye, which is exactly why we address them last.
Colour runs D, completely colourless, to Z, visibly tinted. For white gold or platinum settings, aim for E to F. For yellow gold, a strong trend again in 2026, G to H looks identical to the eye and costs meaningfully less. For most buyers F or G is the right balance of beauty and budget.
Clarity runs FL, flawless, down through VVS, VS and SI. The concept that matters is "eye-clean": no inclusions visible without a jeweller's loupe.
- VVS1 to VVS2: premium, inclusions invisible under magnification. Lovely, and increasingly affordable with lab grown pricing.
- VS1 to VS2: the most popular bridal zone, eye-clean in nearly every stone size.
- SI1 to SI2: often eye-clean depending on the individual stone, and much better value.
Going all the way to VVS is the grade least likely to matter to anyone looking at the ring across a table. Understand the grades properly in our 4Cs guide.
Getting the ring size right without spoiling the surprise
This is the single most common reason rings come back to us after a proposal, and it is entirely avoidable.
The average women's ring size in India is around 11 to 14 for the ring finger, but averages are a poor substitute for the real number. Ways to find it 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 and photograph it against a ruler.
- Ask her sister, best friend or mother. They very often know.
Proposals are frequently a surprise, so an approximate size is normal. What matters is the resizing policy. At Goenka Jewellers, complimentary resizing is included within the first year on most designs, so a small mismatch is not the end of the world. Confirm this with any jeweller before you pay, because engagement rings are bought under time pressure and proposals do not wait for a perfect size.
Lab grown vs natural: the question everyone asks eventually
A lab grown diamond and a natural diamond are chemically, physically and optically identical. Both are pure crystallised carbon, both a 10 on the Mohs hardness scale, both graded by the same labs on the same 4C scale. The only real differences are origin, price and resale dynamics.
The price gap is the one that changes buying decisions. Lab grown typically runs about 90% less than a natural diamond of the same grades. That is the difference between a modest natural solitaire and a lab grown stone twice or three times the size for the same money, which is exactly why engagement rings have become one of the fastest growing lab grown categories in India.
On resale, be clear-eyed. The secondary market for lab grown diamonds in India is still developing, so these are pieces to buy for wearing rather than as an investment. What protects you is the policy you buy under. Ours is published in full on our return and buy-back policy page:
Buy-Back: cash return of 100% on gold and 80% on diamonds, and 100% on diamonds when you exchange rather than encash, valued at market rates on the date of return.
Customised and made to order products are non-returnable and non-exchangeable.
Terms and conditions apply. Full policy on our return policy page.
That last line deserves real attention on an engagement ring, because engagement rings are the category most likely to be made to order. If you commission a bespoke design, in a specific size, with a stone you chose, it sits outside the return and exchange terms. That is standard across most of the trade, for the obvious reason that a piece built to one person's specification cannot go back into stock.
So decide which matters more to you before you order. A design from our ready to ship collection keeps the buy-back and exchange route open. A bespoke commission gives you exactly the ring you pictured, and closes that route. Neither is the wrong answer, but you should choose it deliberately rather than discover it later. The whole subject is worked through in lifetime exchange vs cash buyback.
What to check before you pay, anywhere, including here
- IGI certificate, verified live. Enter the report number at igi.org yourself before paying. Any hesitation from the seller is your answer. Our guide to IGI certified lab grown diamonds explains what each line on the report means.
- The certificate matches the laser inscription on the diamond's girdle. Ask to see it under a loupe.
- Cut grade specifically, not just "certified". A certified diamond with a Good cut is still a certified diamond, and still duller than it should be.
- BIS hallmark on the gold. Non-negotiable, festival season or not.
- A detailed invoice listing the diamond's specs, the metal weight and the price breakdown as separate lines.
- Buy-back and exchange terms, in writing, including the exclusions. Ask for the percentage on the diamond, the percentage on the gold, and what the policy does not cover. Verbal promises do not survive a return visit two years later.
- Ring sizing and resizing policy. Know it before you buy, not after.
Common mistakes we see most often
- Buying for carat weight alone. A 1.00 ct stone with a poor cut looks worse than a 0.80 ct stone with an 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 works with their hands daily is a recipe for damage.
- Buying online without seeing the ring. Photographs can flatter a diamond that looks ordinary in person. For a purchase this significant, view it in person or on a live video call.
- 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.
Our honest recommendation
If we had to give one piece of advice above all the rest: buy the best cut you can afford, choose a shape and setting that suits her hand and daily life, and let lab grown pricing do the work of making the carat weight generous.
That order, cut, shape, setting, carat, then colour and clarity, is how you end up with a ring that looks like it cost more than it did, instead of one that cost more than it looks.
Why buy from Goenka Jewellers
- Every diamond IGI certified. No exceptions, no asterisks.
- Every band BIS hallmarked. Verified, not just claimed, in 9K, 14K and 18K.
- Flat per carat pricing that does not climb with size, from 1 carat to 8 carat.
- Transparent pricing. Stone, gold, making and GST shown as four separate numbers, not folded into one opaque figure.
- Buy-back on eligible pieces: cash return of 100% on gold and 80% on diamonds, or 100% on diamonds when you exchange, valued at market rates on the date of return. Customised and made to order products are excluded.
- Complimentary resizing within the first year on most designs, plus free cleaning and prong checks.
- Two showrooms, Kolkata and Delhi, plus video consultation. No pressure and no commission-driven salesmanship.
- We are the manufacturer, with our own workshop in Kolkata, so custom designs are made in-house.
Browse our engagement ring collection, see real figures by carat in our full lab grown diamond price guide, or skip the reading altogether and book a consultation in Kolkata or Delhi. Bring your budget, we will bring the loupe.
Frequently asked questions
What is the most important factor when buying an engagement ring? Cut. It determines how much a diamond sparkles, and it matters more to how the ring looks than colour, clarity, or even carat weight.
How much does a lab grown diamond engagement ring cost in India? Indicatively, from about ₹40,000 for a well cut 0.30 to 0.50 ct design, around ₹70,000 to ₹1,50,000 for 0.70 to 2.00 ct, and ₹3,00,000 and above for 3.50 ct and larger. Exact price depends on cut, colour, clarity, gold weight and karat.
Are lab grown diamonds real diamonds? Yes. They are chemically, physically and optically identical to mined diamonds, certified by the same labs on the same grading scale. The only difference is origin.
What carat size is best for an engagement ring? There is no universal best. One carat is the most aspirational size in India, but a well cut 0.70 to 0.90 ct stone in a halo setting can look just as substantial for meaningfully less money.
Should I choose a round or oval diamond? Round brilliants give maximum classic sparkle and hold resale value best. Ovals appear larger per carat because of their elongated shape and are currently the most requested fancy shape. The choice is personal style, not a quality difference.
Do engagement rings need to be resized after the proposal? Often, yes, because proposals are frequently a surprise and an approximate size is used. Confirm the jeweller's resizing policy before buying. Ours is complimentary within the first year on most designs.
Do lab grown diamonds lose their sparkle over time? No. Diamond is the hardest known natural substance. With basic care, the sparkle lasts a lifetime.
Is the resale value of lab grown diamonds good? The open resale market in India is still developing, so lab grown diamonds are best bought for wearing rather than as a financial investment. On eligible pieces, our written buy-back gives you 80% cash on the diamond and 100% on the gold, valued at market rates on the date of return. Customised and made to order products are excluded.
Can I upgrade the ring later? On an eligible piece, yes. Exchange gives you 100% of the diamond value and 100% of the gold value toward a new piece, which is how a first ring becomes a bigger one on an anniversary. Customised and made to order rings are non-exchangeable, so raise it with us before you commission.
Do you offer customisation? Yes. We design and customise rings to your specifications at both our Kolkata and Delhi showrooms, and we manufacture in our own workshop. Do note that customised and made to order pieces are non-returnable and non-exchangeable, so if you want to keep the buy-back route open, choose a ready to ship design instead.