Give your students a clear introduction to rocks and rock-forming minerals; the specimens in the introductory set are easy to differentiate from one another and clearly show the traits of each type. The set is housed in a compartmented collection box, and an identification key is included.Contents:16 numbered samples, 1" x 1"Minerals: biotite, feldspar, quartz, calciteRocks:Igneous: basalt, granite, rhyolite, gabbroSedimentary: conglomerate, limestone, sandstone, shaleMetamorphic: gneiss, marble, quartzite, schist.