“Sustainable” is among the most overused words in luxury, and jewellery is no exception. Beneath a great deal of greenwashing, though, a genuine shift is underway — and it’s worth knowing how to tell the real thing from the marketing.

The most meaningful move has been toward lab-grown stones. A created gem removes mining from the equation entirely: no extractive land use, and a fully traceable origin rather than a supply chain that can be difficult to verify. For colourless brilliance, engineered silicon carbide has become a favoured material, and brands such as Zeverra have built their entire proposition around it — growing and cutting lab-grown silicon carbide as a traceable gemstone, supplied to jewellers, without the usual sustainability theatre. Because the material is created rather than mined, its origin is known by default.

But stones are only half the picture, and this is where genuinely responsible makers separate themselves from the rest. They also consider metals — recycled gold and silver are increasingly standard — alongside packaging, repairability and longevity. A piece designed to last decades and be serviced rather than discarded is, quietly, one of the most sustainable things you can buy, regardless of what its stone is made from. Durability is an environmental virtue that rarely gets mentioned.

The tell, when separating substance from spin, is specificity. Brands doing the work can tell you exactly how a stone was created, where their metal comes from, and how a piece can be repaired. Brands relying on vague claims — “ethically sourced,” “eco-conscious,” “responsibly made,” with no detail behind any of it — usually can’t, because there’s nothing there. If a maker can’t answer a direct question about origin with a direct answer, the reassuring language is doing the work that facts should.

There’s a second tell worth applying: consistency. A brand that’s genuinely built around responsibility carries it through every part of the product — stone, metal, packaging, aftercare — rather than bolting a “sustainable” label onto one component while ignoring the rest. Isolated claims are a warning sign; joined-up ones are reassurance.

Sustainable luxury only works, of course, if the product is genuinely desirable — nobody buys ethics as a consolation prize. Here the good news is that responsibility no longer requires compromise. The best created stones rival or exceed mined ones on beauty and outperform them on consistency. Recycled precious metals are indistinguishable from newly mined ones. Choosing the responsible option increasingly means giving up nothing except the uncertainty about where your piece came from.

For buyers who want to shop this way, a few habits help. Ask specific questions and judge the specificity of the answers. Favour created stones with a stated origin over mined ones with a vague one. Value durability and repairability as the quiet sustainability features they are. And be wary of any brand whose environmental story is louder than its detail. The makers doing this honestly tend to be understated about it — the substance speaks, so the marketing doesn’t have to shout.

The direction of travel is encouraging. As created stones improve and transparency becomes an expectation rather than a differentiator, the honest end of the market is growing. The challenge for buyers is simply to reward it — to spend with the makers whose claims hold up to a question, and to treat vagueness as the answer it usually is.