Collection Of 20 Rocks & Minerals, 1 Each

The United Scientific® Collection of 20 Rocks & Minerals is a boxed set of 10 rock specimens, covering igneous, sedimentary and metamorphic types, and 10 mineral specimens such as quartz, calcite, feldspar, gypsum and magnetite. Specimens average 2 x 3 x 1.5 cm, and a specimen key inside the box identifies each one. Earth science teachers use it for introductory rock and mineral identification lessons.