Most jewellers in Bangalore will customise your piece — but few will show you exactly what you’re getting before it’s cast
Most jewellers in Bangalore will customise your piece — but few will show you exactly what you’re getting before it’s cast in gold. That gap between “yes, we can do that” and a detailed CAD rendering you can review, revise, and approve is where custom jewellery orders go sideways. This guide walks through how the customisation process actually works at ONYA Diamonds — from the first conversation to the moment a hallmarked, IGI-certified piece arrives at your door — so you know what to expect at every stage.
The short version: the process is more structured than most people expect, the decisions are fewer but more consequential, and the timeline from idea to delivery tends to run 15–20 days for manufacturing plus 2–3 days for shipping across India. Ready-to-ship pieces in stock ship within 3–4 days. If you’re working toward a specific occasion, that’s the number to plan around.
Step 1 — Share Your Idea (Any Format Works)
The customisation process starts with a conversation, not a form. You can reach ONYA’s team directly via WhatsApp or phone at +91 8073522403. Bring whatever you have: a Pinterest screenshot, a reference photo from Instagram, a rough sketch, or just a description in plain language. The team’s job at this stage is to translate your idea into a workable brief — diamond shape, approximate carat size, setting style, and metal choice.
If you have no starting point, that’s fine too. ONYA’s design consultants can walk you through the options. The most common decisions at this stage are:
- Diamond shape — round brilliant, oval, pear, emerald, marquise, cushion, or princess cut. Shape affects both the visual character of the piece and the price: round brilliants tend to cost more than fancy shapes of the same carat weight, because more rough is lost during cutting.
- Setting style — a solitaire puts the entire visual weight on the centre stone, while a halo surrounds it with smaller pavé-set diamonds to create a larger visual footprint. A pavé band adds continuous sparkle along the shank without changing the centre stone. Hidden halos add a ring of small diamonds beneath the centre stone, visible from the side profile but not from above — a detail that photographs well and adds depth without bulk.
- Metal choice — 14K or 18K gold in yellow, white, or rose. ONYA uses BIS hallmarked gold across all pieces, which means the purity is independently verified, not self-declared.
Customers have also brought in their own designs and had them built from scratch. As one ONYA customer put it: “The best part is the flexibility to customise size, shape, length, and metal type (yellow/rose/white gold). You can also bring your own design and they’ll make it for you.”
Step 2 — The CAD Rendering: Where You Actually See What You’re Buying
Once the brief is locked, ONYA’s design team produces a CAD (Computer-Aided Design) rendering — a photorealistic 3D model of your piece before a single gram of gold is poured. This is probably the most important step in the entire process, and it’s worth spending time here.
The CAD rendering shows you the proportions, the height of the setting off the band, the spacing of accent diamonds, the profile from the side, and how the stone sits relative to the metal. You can request changes at this stage: adjust the prong style, raise or lower the setting, change the band width, add or remove a hidden halo, or shift the diamond orientation. ONYA provides real-time updates at every stage of the order — from CAD to creation to certification — so you’re never left guessing where things stand.
For a standard engagement ring or pendant, the CAD is typically ready within a few days of the brief being finalised. Revisions are part of the process. The piece doesn’t move into production until you’ve approved the design — that approval is the gate.
A note on what to look for in the CAD: the band width and setting height matter more than most people expect. A 1.5mm band makes the centre stone appear larger; a 2mm band feels more classic and is slightly more durable for daily wear. If you’re designing a ring for everyday use — not just special occasions — it’s worth asking your consultant about the trade-offs between a cathedral setting (which lifts the stone higher and creates architectural presence but can catch on fabric) and a lower-profile bezel or four-prong setting that sits closer to the finger.
Step 3 — Diamond Selection and the Clarity Question
All ONYA diamonds are VVS-EF clarity, IGI-certified lab-grown stones. For most buyers, this is more than enough information — the pieces are eye-clean, the certification is from a globally recognised grading body, and the quality is consistent across the range.
But if you’re building a fully custom piece and specifying the centre stone yourself, a few things are worth knowing. Diamond shape affects how inclusions are distributed: emerald and asscher cuts have larger, open facets that make inclusions more visible than the brilliant facets of a round or oval cut. For fancy shapes, VVS clarity is a reasonable floor. For round brilliants, VS1 or VS2 can deliver the same eye-clean appearance at a lower price point — though ONYA’s standard offering is VVS-EF, which removes that variable entirely.
Carat weight is the easiest decision to overthink. A 0.75ct stone in a well-proportioned halo setting will appear comparable in size to a 1ct solitaire. If you’re working within a budget, discussing the visual effect of the setting alongside the stone size tends to yield better outcomes than optimising for carat weight alone.
Lab-grown diamonds carry the same chemical composition, hardness, and optical properties as mined diamonds. The difference is origin. ONYA’s diamonds are priced at approximately 20% of natural diamond equivalents, which means the same stone quality that would cost ₹3 lakh in a mined diamond typically runs closer to ₹60,000 in a lab-grown equivalent. That delta is what makes a fully custom piece — one you’ve designed from scratch — financially viable for most buyers in Bangalore.
Step 4 — Production, Hallmarking, and What Happens After You Approve
Once the CAD is approved, the piece enters production. Gold is cast to the approved model, set by hand, polished, and then submitted for BIS hallmarking — the government-mandated quality certification that confirms the gold purity matches what’s stated. A 14K piece carries a 585 stamp; an 18K piece carries a 750 stamp. Both are verifiable independently.
The IGI certificate for the diamond travels with the piece. The report number is laser-inscribed on the girdle of the stone and can be verified directly on the IGI website. This matters for resale and exchange: a piece with a traceable certificate and hallmarked metal has a documented value that a non-certified piece doesn’t.
ONYA’s custom orders take 15–20 days to manufacture, followed by 2–3 days of free, insured shipping to anywhere in India. Orders are shipped through specialist jewellery logistics partners, fully insured. If something isn’t right when the piece arrives — sizing, finish, a detail that doesn’t match the approved CAD — there’s a 7-day return and refund window from delivery, plus a lifetime exchange policy and 80% buyback assurance that applies even to custom designs.
That last point is unusual in the custom jewellery space. Most custom orders are non-returnable by default. ONYA’s willingness to stand behind custom pieces with exchange and buyback terms is a meaningful signal about quality confidence.
What You Can Customise Beyond Rings
The customisation process at ONYA applies across the full product range — not just engagement rings. A few categories where custom orders are particularly common in Bangalore:
Mangalsutras — ONYA’s diamond mangalsutra collection includes everything from pear-shaped solitaire pendants to geometric arch designs and swan-inspired cluster settings. Custom mangalsutras typically involve specifying the pendant style, chain length, gold karat (14K or 18K), and whether the centre stone is a solitaire or a cluster. The design language tends to blend traditional form with contemporary detailing — pieces that read as mangalsutras from a distance but hold up as standalone pendants when worn without the black bead chain.
Solitaire studs and earrings — Shape, prong count, and gold colour are the main variables. A round brilliant in a six-prong yellow gold setting reads classic; the same stone in a bezel setting in white gold reads modern. Both are available as custom orders.
Necklaces and pendants — ONYA’s necklace collection ranges from minimalist bezel-set solitaires to multi-diamond cascade designs. Custom necklaces often involve adjusting chain length, pendant size, or the combination of diamond shapes in a multi-stone design.
Men’s rings — A growing category. Men’s custom diamond rings at ONYA typically feature wider bands with channel or pavé settings, or a single flush-set stone for a more understated look.
For any of these, the process is the same: start with a WhatsApp conversation, review the CAD, approve, and receive a certified, hallmarked piece within three weeks.
A Few Things Worth Knowing Before You Start
Budget transparency matters early. The biggest variable in custom jewellery pricing is diamond carat weight, followed by gold weight. Sharing your budget at the start of the consultation — not after the CAD — allows the design team to make recommendations that actually fit, rather than producing a design you then have to scale back.
The CAD is not the piece. Photorealistic renders are accurate in proportion and setting style, but the actual sparkle of a diamond under light is something a render can approximate but not fully replicate. If you’re in Bangalore and want to see comparable pieces in person before committing to a custom order, ONYA has stores in Jayanagar, Whitefield, Indiranagar, HSR Layout, and Neeladri. Walking in with your CAD reference and viewing a similar ready-made piece alongside it is a reasonable way to calibrate expectations.
Sizing for rings. Get sized at the store or use ONYA’s size guide before the order is placed. Most settings can be resized one or two sizes after delivery, but heavily pavé bands and eternity-style rings are harder to adjust. Getting the size right before production avoids the complication.
The exchange policy applies to custom pieces. ONYA offers 100% lifetime exchange and 80% buyback, and this applies even on custom-designed jewellery. For a piece you’ve built from scratch, that’s a meaningful long-term assurance — your design isn’t a sunk cost if your taste or circumstances change.
