High Down Quarry is the type locality for the aluminium phopshate wavellite. It was discovered there by John Hill in the late eighteenth century and named for William Wavell a local physician and #mineral collector. (photo by Crazy Dave Green on Flickr)
Fordite, also known as Detroit agate, is actually old automobile paint which has hardened sufficiently to be cut and polished. It was formed from the build up of layers of enamel paint slag on tracks and skids on which cars were hand spray-painted (a now automated process), which have been baked numerous times. In recent times the material has been recycled as eco-friendly jewelry.