What Exactly Is Jet?

Jet is not a mineral in the usual sense, but a fossilised wood. Around 180 million years ago, during the Jurassic period, fallen trees — often araucaria, a type of monkey puzzle — were buried in mud and compressed over millions of years. The result is a lightweight, deep black material that can be carved and polished to a soft, mirror-like shine. The finest British jet comes from the cliffs around Whitby in North Yorkshire, where it has been collected from beaches and mined in shallow seams for centuries. Unlike black glass or onyx, jet feels warm in the hand and is remarkably light, which makes it comfortable for earrings, brooches and long strings of beads.

From Whitby Shores to Early British Ornaments

Long before Victorian mourning jewellery, jet was already treasured in Britain. Early Bronze Age graves in Scotland and northern England contain jet necklaces and buttons, carefully shaped and strung. Roman craftspeople working in Yorkshire carved jet into hairpins, rings, bracelets and amulets. The material was valued not only for its colour but for its supposed protective qualities — it was often worn to guard against misfortune. By the medieval period, Whitby had become a recognised source of jet, and small workshops turned it into rosary beads, crosses and decorative pins. The lightweight nature of jet made it ideal for personal ornaments that could be worn all day without discomfort.

The Victorian Mourning Tradition

The tradition most people associate with jet is Victorian mourning. After Prince Albert died in 1861, Queen Victoria entered a long period of mourning, and her choices set the fashion. Strict mourning etiquette required black clothing and black jewellery for set periods. Jet was perfect: it was black, sombre, British, and available in large quantities from Whitby. Workshops in the town employed hundreds of men, women and children, producing brooches, earrings, crosses, lockets, bracelets and necklaces. Jet became so closely linked with mourning that it was often called “mourning jet”, even though it had been used for centuries before. Deep mourning allowed only jet, black glass, or occasionally dark stones like onyx; as mourning eased, other materials could be introduced. The demand declined after the late Victorian period, but the association remains strong.

Beyond Mourning: Decorative and Protective Uses

Jet was never only for sorrow. Throughout the nineteenth century, it was also worn as everyday decoration. Brooches carved with flowers, leaves and geometric patterns, hat pins, buckles and buttons brought a subtle shine to dark clothing. Jet beads were strung into necklaces and bracelets, sometimes combined with silver or gold findings. In some regions, jet was kept as a protective charm — a piece carried in a pocket or hung in a home. Because it is soft enough to carve, it could be shaped into intricate cameos, though black cameos are less common than shell. Today, handmade jewellery makers value jet for its ability to add drama without weight, and for its deep, non-metallic black that flatters almost any outfit.

How to Spot and Care for Jet

If you are buying or working with jet, a few simple checks help. Jet is warm and light; black glass and onyx are cold and noticeably heavier. On an unglazed white tile, jet leaves a brownish streak, while glass leaves none. Vulcanite, a Victorian rubber substitute, is also lightweight but tends to smell faintly of sulphur when warmed. To care for jet, treat it gently. Clean with a soft, dry cloth or a barely damp cloth and mild soap, then dry immediately. Avoid ultrasonic cleaners, alcohol, perfume, hairspray and acidic cleaners. Store jet separately from harder stones in a padded pouch or lined box. When restringing, use a soft cord and knot between beads to reduce rubbing. With careful handling, jet can last for generations.

Bringing Jet into Contemporary Handmade Jewellery

For modern makers, jet offers a lovely contrast to bright metals and colourful stones. Its low density means large earrings and pendants stay comfortable. It drills and carves easily with hand tools, though you should wear a dust mask when sanding. Polish with a fine compound and a soft buff to bring up its natural sheen. Pair jet with sterling silver for a clean, contemporary look, or with warm gold for something richer. Because it is a fossil, each piece has subtle variations — small cracks, slight grain, occasional brown flashes under strong light. Those imperfections are part of its character. Whether you are making a simple pendant or a beaded necklace, jet connects your work to a British tradition that stretches from Bronze Age graves to Victorian drawing rooms, and into the present day.