An exceptional value for a quality collection. Originally developed by WARD’S, over the years the Washington School Collection has become one of the most widely accepted secondary-school earth science teaching aids. Carefully selected, high-quality rock and mineral samples provide students with an excellent introduction to earth materials and their characteristics. A matching set of testing chips, ideal for quizzing students on specimen identification, is also included. The set is housed in a compartmented collection box, and descriptions of each specimen are printed on a label in the lid of the box.Contents: 40 numbered samples, 1″ x 2″40 matching testing chips, 1/2″Minerals:Rock-Forming: calcite, garnet, hornblende, microcline, milky quartz, muscovite, plagioclase feldspar, quartz (rock crystal)Metallic Ore: bauxite, chalcopyrite, galena, hematite, limonite, magnetite, sphaleriteIndustrial: graphite, gypsum, halite, pyrite, talcRocks:Igneous: basalt, gabbro, granite, obsidian, rhyolite, syeniteSedimentary: argillaceous sandstone, bituminous coal, chert, conglomerate, dolomitic limestone, gravel, red sandstone, shale, shell limestoneMetamorphic: gneiss, marble, quartzite, schist, slate
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