Mookaite Jasper, Copper Wire Wrap (with chain)Jasper is an opaque stone originating from silica rich sediment or volcanic ash. It can occur in any color depending on the mineral content of the original sediment. Beautiful patterns can also occur in jasper. This happens when the original rock forming materials are fractured or distorted in the ground, and then are later filled in with other minerals. A specific jasper may be named for its location, or may be named imaginatively by describing its