The National Geographic and Dr. Cool options contain nine types of gemstones in the packages we highlighted. These include amethyst, sodalite, rose quartz, dalmatian jasper, red jasper, aventurine, agate, black jasper and tiger’s eye.  However, if your future geologist wants to obtain more types of rocks, National Geographic has five separate refill packs that have a plethora of stone varieties. These include:  Eight types of jasper (six that are not available in the original kit) Different colors of agate Labradorite Indigo gabbro Hematite Types of petrified wood fossils.