Blue Biggs Jasper stone. Blue Biggs Jasper is a silicated volcanic ash. It was formed during a volcanic eruption and is part of a Miocene series of rocks called the John Day Formation, near Biggs, Oregon, USA. It is a decorative stone used for jewellery and trinkets.
A trip to the British seaside just wouldn't be complete without a stick of rock to break your teeth on. Made from pulled sugar, rock took off in the 1800s, though there's serious debate about where lettered rock was first produced. Blackpool usually claims the honour, though nearby Morecambe has also been credited.