The two rocks are the 15th and 17th meteorites to be found from the moon and Mars, respectively. The Mars meteorite, found in November in Morocco, weighs a single ounce. The far heftier lunar meteorite weighs in at 2.2 pounds. The meteorite was bought in January in Morocco but is thought to have been found last year in neighboring Algeria. A geode is a hollow rock lined with crystals.
Geodes often start as large bubbles in lava that are frozen in when lava hardens.
Hot water carrying dissolved minerals flows through these cavities. As the water cools, the minerals come out of solution and crystallize on the wall of the geode.