10 Questions to Ask Before Ordering a Custom Lab Grown Diamond Engagement Ring Online in India

Ordering a custom lab grown diamond engagement ring online in India requires asking the right questions before you transfer any money. The ten questions below cover certification, gold purity, CAD approval, timelines, resizing, and return rights, giving you a clear checklist to separate trustworthy jewellers from those who rely on vague promises. Skipping even one of these can cost you thousands of rupees or leave you with a ring that looks nothing like what you imagined.

Custom orders carry more risk than ready-to-ship pieces because you cannot inspect the ring before it is made. In 2026, with lab-grown diamond prices having stabilised after a significant correction from 2022 highs, more Indian buyers are commissioning bespoke pieces, which makes knowing exactly what to ask even more important.

1. Which certification body has graded the diamond, and can I verify the report number online?

Ask for the specific lab name and the report number before you agree to anything. IGI (International Gemological Institute) is the most widely used certification body for lab-grown diamonds in India, with offices in Mumbai and Surat. SGL (Solitaire Gemological Laboratories) is the leading domestic option. Both issue reports you can verify independently on their respective websites by entering the report number.

Without an independent report number, you have no way to verify the stone after delivery. The report should state the diamond's carat weight, colour grade, clarity grade, and cut grade. Check that the report number is laser-inscribed on the diamond girdle: this is your protection against stone swapping between order and delivery.

2. Is the gold setting BIS hallmarked, and what is the exact karat?

The diamond gets most of the attention in a custom ring, but the gold setting can represent 25 to 40 percent of the total purchase price on a typical 0.50-carat solitaire in 18K gold. Without a BIS hallmark, there is no independent verification that the metal is actually 18K rather than 14K or something lower.

Ask the jeweller to confirm the BIS hallmark grade (750 for 18K, 585 for 14K) and whether each piece will carry a unique HUID (Hallmark Unique ID). Once you receive the ring, you can verify the HUID through the BIS Care app, available on Android and iOS. If the code does not return a matching record, contact the BIS consumer helpline before accepting the piece.

Prachha Jewels, based in Surat, offers custom rings in both 14 Karat Gold and 18 Karat Gold, with the metal grade stated clearly on each listing.

3. Will I see and approve a CAD design before any metal is cast?

A CAD (computer-aided design) file is a three-dimensional digital model of your ring. Any reputable custom jeweller will share this with you for approval before production begins. The CAD stage is your only real opportunity to change proportions, stone placement, band width, or setting height without incurring extra cost.

The initial CAD rendering typically takes two to five business days after the design brief is finalised, with revisions adding a few more days. Do not let a jeweller skip this step or rush you through it. If the ring goes into production before you sign off on the CAD, you have very little recourse if the finished piece looks wrong.

4. What is the realistic production timeline from CAD approval to delivery?

Production timelines for custom lab-grown diamond rings in India vary. Simpler settings tend to be completed within seven to fourteen days of CAD approval. More intricate designs, such as pavé bands, multi-stone settings, or pieces with engraving, can take three to six weeks. Some jewellers quote twenty-one days as a standard window for custom work.

Get the timeline in writing, including the date by which the CAD will be sent to you and the expected shipping date. If you are ordering for a specific occasion (an engagement, a wedding, an anniversary), build in at least one week of buffer. Ask explicitly whether the quoted timeline includes shipping time or only production time.

5. What are the 4Cs of the specific stone being set in my ring?

The 4Cs, which are cut, colour, clarity, and carat, determine both the appearance and the price of the diamond. For lab-grown stones, colour grades of E or F and clarity grades of VS1 or better are generally considered strong specifications for an engagement ring. Cut is arguably the most important factor for brilliance: an Excellent cut in a round brilliant will outperform a Very Good cut of the same colour and clarity.

Ask the jeweller to share the exact 4C specification of the stone they plan to use before you commit. Some online sellers quote a price for a "1-carat ring" without specifying whether the stone is G VS2 or E VVS1, two very different diamonds at very different price points. Quality 1-carat IGI-certified solitaires in India range from roughly Rs 65,000 to Rs 1,10,000 depending on colour, clarity, and metal, so the specification matters a great deal.

6. What is the return, exchange, and resizing policy for custom orders?

Custom-made jewellery sits in a grey area under most return policies because it was built to your specifications. Many jewellers will not accept returns on custom pieces at all. Before you pay a deposit, ask these three things clearly:

• Returns: Is a return possible if the ring does not match the approved CAD design?
• Resizing: Is one free resizing included, and if so, within what timeframe?
• Exchange: Can the diamond or metal be exchanged if the stone does not match its certificate?

A jeweller who offers at least one free resizing and a clear process for resolving discrepancies between the delivered ring and the approved CAD is behaving responsibly. One who cannot answer these questions specifically is worth reconsidering.

7. Does the price include making charges, GST, and shipping, or are those added later?

Custom ring pricing in India often separates the diamond cost, the gold cost (calculated by weight), and the making charge. GST applies at 3 percent on gold jewellery and 1.5 percent on cut and polished diamonds. Shipping insurance may or may not be included. Some jewellers also charge a separate CAD design fee.

Ask for a full itemised quote in writing before you pay the deposit. The quote should show the diamond price, gold weight and rate, making charges, GST, and any shipping cost. If the final invoice differs significantly from this quote without a clear explanation, that is a problem.

The Questions Are the Purchase

Commissioning a custom lab-grown diamond engagement ring online is a purchase that typically runs Rs 80,000 to Rs 2,00,000 for a 1-carat solitaire, depending on the metal and stone specification. The questions above are not meant to make you suspicious of every jeweller. Most are honest, and the ones who are not tend to become obvious the moment you ask for specifics in writing.

A jeweller who answers all ten questions specifically, in writing, and without hesitation is almost certainly worth working with. One who deflects, gives vague answers, or pressures you to pay before the CAD is approved is worth walking away from, no matter how appealing the design looks on the website. Start with the certification question and the itemised quote: those two alone will filter out most of the bad actors before you spend a rupee.

Frequently Asked Questions

Can a custom lab grown diamond engagement ring be resized after delivery?

In most cases, yes, though it depends on the setting style. Solitaire and simple band designs are generally resizable by one to two sizes without structural damage. Pavé or eternity bands are harder to resize because the stones run the full circumference. Always confirm the resizing policy and any associated cost in writing before placing your custom order.

How do I verify that the IGI certificate matches the diamond in my custom ring?

Every IGI-certified diamond has a unique report number laser-inscribed on the girdle, the narrow edge between the crown and pavilion. Ask the jeweller to show you this inscription under magnification, or request a close-up photograph before delivery. You can then enter the report number on the IGI website to confirm the stone's grading details match what was promised.

Is a 50 percent deposit standard for custom lab grown diamond rings in India?

A deposit of 50 percent before production begins is common practice among Indian online jewellers for custom work. Some ask for the full amount upfront; others accept 30 to 40 percent. A deposit is reasonable. Paying 100 percent before seeing the CAD design is not, and most reputable jewellers will not ask for it at that stage.

What is the difference between IGI and SGL certification for lab grown diamonds in India?

IGI is the globally dominant certification body for lab-grown diamonds and is widely accepted for resale both in India and internationally. SGL is India's leading domestic certification lab, recognised within the country but carrying less weight in international markets. For high-value custom pieces, IGI certification is the stronger choice, particularly if you may want to resell or upgrade the stone in the future.

How long does a custom lab grown diamond engagement ring typically take to make in India?

From the point of CAD approval, most custom lab-grown diamond rings take between seven and twenty-one days to produce, with simpler settings at the shorter end and intricate multi-stone or engraved designs at the longer end. Add two to four days for shipping within India. Always confirm the timeline in writing and build in buffer time if the ring is needed for a specific date.