Collection Of 20 Minerals, 1 Each

The United Scientific® Collection Of 20 Minerals by United Scientific is a boxed teaching set of 20 basic mineral specimens, from agate and calcite to quartz, sulfur and tourmaline. Specimens average 2 cm x 3 cm x 1.5 cm and are matched to a specimen key printed inside the box. Earth science teachers in middle school, high school and introductory college courses use it for mineral identification lessons and classroom reference displays.