© Weston Earth Images Ltd.
This is known as 'poppy jasper', and comes from the foothills of the Santa Cruz mountains in
California. Jasper is an opaque, colourful form of chalcedony that forms by deposition from
low-temperature, silica-rich waters percolating through cracks and fissures in other rocks.
The 'flowers' of poppy jasper are sections through spherical orbs whose formation is still not