Request comes as a class set of 10 individual kits.
Kit includes 18 Rocks: Obsidian, Scoria, Pumice, Rhyolite, Granite, Gabbro, Shale, Sandstone, Coal, Breccia, Limestone, Kaolinite, Slate, Schist, Gneiss, Amphibolite, Quartzite, Marble, Blank Chart and Answer Key.