Singer Ozzy Osbourne spotted wearing a Cartier

Ozzy Osbourne, the Prince of Darkness and founding vocalist of Black Sabbath, was photographed at close quarters with a stack of jewellery that would stop most collectors cold — and anchoring the wrist ensemble is a Cartier Ballon Bleu 42mm in solid 18k yellow gold with a full diamond bezel, a reference consistent with the WE902027.

Introduced in 2007 under creative direction that sought a contemporary alternative to Cartier's more heritage-driven lines, the Ballon Bleu became an instant commercial and critical success. The 42mm case houses Calibre 049, an automatic movement with a 42-hour power reserve, visible through a display caseback on many variants. The silver opaline dial carries guilloché finishing at its centre, bold Roman numerals in blued steel, and a discreet date window at 3 o'clock — all period-correct Cartier signatures. The sapphire cabochon set into the crown guard remains the model's most distinctive design flourish, a bubble of blue that gives the watch its name.

The yellow gold and diamond-bezel configuration places this watch firmly in grand joaillerie territory. The bezel features two rows of round brilliant-cut diamonds totalling approximately 1.3 carats, set in yellow gold to maximise warmth against the case metal. The integrated yellow gold bracelet — with its tapering links and hidden deployant clasp — reinforces the cohesion of the design. This is a piece built for visibility, and it earns it honestly through craft rather than size alone.

For collectors, the full yellow gold Ballon Bleu with diamond bezel occupies an interesting niche: it is simultaneously a mainstream luxury watch and a serious precious-metal investment. Grey-market pricing has remained resilient, buoyed by consistent demand from buyers in Asia and the Middle East as well as celebrity association. The reference is a reliable long-term hold rather than a speculative flip.

Ozzy Osbourne's relationship with jewellery is well documented — his knuckle tattoos, stacked rings, and layered bracelets are as much a part of his identity as his voice. The Cartier Ballon Bleu WE902027 sits naturally in that aesthetic: opulent, immediately readable, and utterly unapologetic. A fitting choice for rock's most enduring iconoclast.