The Mesa Ring has it all--beautiful color, depth of feeling and a very interesting series of markings through the ammolite that give it a sense of old scribing on mesa walls. The colors range from magenta red through golden, to green and then deep blue. The markings are cross hatched. The simple four prong mount supports this unusual piece of A+ grade ammolite. This ring is a conversation piece. Fantastic piece, really fantastic price. Ammolite measures 15.25 x 11.50mm