On a visit to Tucson, relatives took me to a gem and mineral show where we saw a collection of geodes. Ordinary on the outside; beautiful on the inside. Will you please tell us how they are formed and ...

The geological history that led to the formation of giant crystals and a 36-foot geode has been revealed by scientists. By looking at the abandoned mine where the geode of Pulpí was found, they were ...

Large purple amethyst cake sparks wedding cake trend. Three different angles of Rachel Teufel's amethyst geode cake to show the depth of the design. Ali N Garrett Photography/Intricate Icings Cake ...