Our Promise

Every piece we make is backed by a promise: honest materials, expert hands, and craftsmanship built to last a lifetime.

At Oscar & Co, “lifetime warranty” isn’t a line in the fine print — it’s the whole point. We built this business on the idea that a diamond you’re proud to wear should come from a process you’re proud to stand behind, from the raw material through to the craftsperson who sets it. Here’s what that means in practice.

What we guarantee

  • Lifetime Warranty

    We stand behind the workmanship and craftsmanship of every piece we make, for life. If a claw needs re-tipping, a setting needs tightening, or a clasp needs repairing due to normal wear, we’ll make it right — no matter how many years have passed.

  • Master Craftsmanship

    Every ring, chain, and setting passes through the hands of experienced craftspeople, supported by the latest jewellery-making technology — from precision CAD modelling to laser welding — so the finished piece always matches the design.

  • Sustainably Made

    Our diamonds are grown, not mined, using a fraction of the land and water disturbance of traditional mining. Our workshops follow responsible, sustainable production practices at every stage, not just in the stone.

  • Fully Traceable

    We can trace every piece back to its bare essential materials — from the diamond’s growth origin to the source of its metal — so you always know exactly what you’re wearing and where it came from.

Our lifetime warranty, in detail

Every Oscar & Co piece is covered against defects in workmanship and craftsmanship for as long as you own it. That covers things like a stone coming loose due to a manufacturing fault, a clasp failing before its time, or a setting that wasn’t finished properly. If it’s our error, we fix it — free of charge.

What the warranty doesn’t cover: loss or theft, accidental damage, normal everyday wear (like surface scratching on soft metals), and damage from a repair carried out by someone other than us. We recommend having your jewellery professionally inspected once a year, which also keeps your warranty in the best possible standing.

Sourced with intention

Every diamond we set is lab-grown — created above ground using processes that replicate natural diamond formation, rather than extracted from it. The result is a stone that’s chemically, physically, and optically identical to a mined diamond, independently certified by GIA, IGI, or GCAL, at a far lighter environmental cost.

Our metals are sourced with the same standard in mind, and every product page carries the specifications — metal type, karat, diamond shape, carat weight, cut, colour, and clarity grade — so nothing about what you’re buying is a mystery. Read more about how we work in About Us, or browse the collection to see it in practice.