Classroom Collection (50 Specimens)

Contents: Rock forming minerals: microcline, plagioclase, hornblende, muscovite, biotite, calcite, quartz. Igneous rocks: pumice, obsidian, scoria, basalt, andesite(porphyry), granite, rhyolite. Metamorphic rocks: serpentine, slate, quartzite, gneiss, talc schist, schist, marble, anthracite coal. Sedimentary rocks: conglomerate, sandstone, banded sandston, shale, oil shale, calcareous tufa, limestone. Ores of common metals and non-metals: phosphate ore-triphylite, gold ore, silver ore, copper ore, coppor ore-chalcopyrite, manganese ore-pyrolusite, lead ore-galena, zinc ore-sphalerite, iron ore-hematite, iron ore-magnetite, aluminum ore-bauxite, molybdenum ore-molybdenite, bryllium ore-beryl, barium ore-barite, fluorine-fluorite, plaster of paris-gypsum. Gemstones: petrified wood, agate, jasper, rose quartz, corundum. Scale of Hardness: talc(1), gypsum(2), calcite(3), fluorite(4), triphylite(5), microcline(6), quartz(7), beryl(8), corundum(9), diamond(10).