This mixed Rock and Mineral collection boxed set comes with 20 quality specimens covering popular Rocks & Minerals. Ideal for educational purposes at all levels; school, college, university or individual use and particularly those who want to practice mineral and rock recognition.The specimens are supplied in a strong cardboard box complete with a coloured data sheet on the inside of the lid.The set includes:ConglomerateSandstoneOolitic LimestoneChalkPumiceObsidianGraniteBasaltMarbleSlateCalciteFeldsparGypsumTalcFluoriteGraphiteRose QuartzPyriteRock CrystalBiotite MicaThe box size is 30cm x 25cm and is 4cm deep.