Large Utah septarian- fossilized mud ball geodes. Yellow is calcite, brown is aragonite, grey is bentonite & white/clear is barite. Stone is made out of mud that dried as the oceans receded & formed balls similar to a geode. Later oceans returned & minerals were absorbed into the mud, this gives them this natural, of the earth look.
Stone is set in hammered 22kt gold clad, adjustable ring. Stone measures 2" H x 1.2" W.