This standard collection of 40 specimens has been used in the classroom for many years. Study categories are under the following headings: rock-forming minerals; ore-forming minerals; industrial minerals; and sedimentary, igneous, and metamorphic rocks. Specimens are about 2 × 1 1/2" and are number coded and keyed to a list on the inside cover of the compartmented container. With Rocks and Minerals study guide.
