Arrests after theft of rare mineral Blue John
Police say the mineral is unique to the Peak District and not found anywhere else in the world.
BBC News
The Peak District is an upland area in central-northern England, at the southern end of the Pennines. Mostly in Derbyshire, it extends into Cheshire, Greater Manchester, Staffordshire, West Yorkshire and South Yorkshire. It is subdivided into the Dark Peak, moorland dominated by gritstone, and the White Peak, a limestone area with valleys and gorges. The Dark Peak forms an arc on the north, east and west of the district, and the White Peak covers central and southern areas. The highest point is Kinder Scout. Most of the area is within the Peak District National Park, a protected landscape designated in 1951.
Police say the mineral is unique to the Peak District and not found anywhere else in the world.