Nasco Rock Collection
Product Number: SB10942
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This is a basic study and reference collection, containing five igneous rocks, five metamorphic rocks, and five sedimentary rocks. Specimens include obsidian, granite, basalt, scoria, rhyolite, sandstone, limestone, shale, travertine, conglomerate, slate, marble, quartzite, gneiss, and amphibolite. These are all typical of the rock group in which they fall, and are basic representatives of the group. Complete set of 15 numbered 1-1/2 in. specimens in a compartmentalized container.