JASPER

Jasper is an opaque rock of virtually any color stemming from the mineral content of the original sediments or ash. Patterns arise during the consolidation process forming flow and depositional patterns in the original silica rich sediment or volcanic ash.Hydrothermal circulation is generally thought to be required in the formation of jasper

The name means "spotted or speckled stone", and is derived via Old French jaspre (variant of Anglo-Norman jaspe) and Latin iaspidem(nom. iaspis)) from Greek ἴασπις iaspis, (feminine noun) from an oriental language (cf. Hebrew יושפה yushphah, Akkadian yashupu)