Cost + timeline for a jewellery Magento build (or migration)?

Realistic ranges for a jewellery brand at $2M–$10M GMV migrating to Magento:

• Magento + Hyvä rebuild (jewellery-specific scope): $35k–$95k. Adds on top of the standard build: fraud integration ($5k–$10k), custom engraving + sizing options ($3k–$8k), made-to-order workflow ($18k–$30k if needed), GIA/IGI cert linkage + appraisal generator ($8k–$15k), secure-shipping module ($5k–$10k), try-at-home program (+$25k–$40k if needed), B2B trade layer (+$8k–$25k if needed).
• Timeline: 10–18 weeks for a typical mid-market jewellery store. Faster (8 weeks) if no bespoke / no try-at-home / no B2B. Longer (20–30 weeks) for full-stack with bespoke + multi-region + try-at-home in scope.
• Hosting: $400–$1,500/mo on Cloudways / Adobe Commerce Cloud / dedicated. Jewellery doesn’t spike like fashion drops, but secure-shipping integrations + fraud-tooling latency demand low TTFB. CDN (Cloudflare) + Hyvä for performance.
• Ongoing: $1.5k–$5k/mo retainer for through-season ops (fraud-rule tuning, made-to-order queue ops, holiday + Valentine’s + Mother’s-Day prep).

Risks specific to jewellery migration:

• Cert PDFs must migrate cleanly — thousands of GIA / IGI PDFs in the old store, each tied to a specific stone SKU. Migration script needs to map cert-number → SKU one-by-one with QA.
• Customer trust + brand authority in jewellery is high-stakes. The new site must look + feel premium from day one. Hyvä-themed Magento + a good designer hit this; default Luma does not.
• Order history + insurance docs must migrate — customers expect to access their past appraisals + insurance binders. Lose that, lose the high-LTV repeat buyer.
• SEO redirects — jewellery brands often have product URLs with cert-number suffixes (/diamond-1ct-vs1-D-color-GIA12345.html). Map every old URL → new URL or you drop 25–40% of organic for ~8 weeks.

Run both stores parallel for 30–60 days behind a feature flag. Flip DNS only after redirects map ≥98% of traffic + 30 successful test orders + 1 dry-run made-to-order commission + 1 secure-shipping pilot to a real customer. Jewellery migrations done well don’t lose ranking; done badly they take a season + Valentine’s + Mother’s-Day to recover.