EISCO Biotite Mica Specimens (Mineral) Approx. 1 inch (3 cm) Pack of 12

12 Biotite Mica Samples, approximately 1 inch (3 cm) in size. Useful for teaching students about varying hardness and cleavage - mica's thin layered structure is unique. Perfect size for classroom identification labs and exercises. Correlates with Next Generation Science Standards Evidence Statements. Pair with Muscovite Mica to show the effect of slight variations in mineral chemistry. Specimens are packaged in clear, labeled and barcoded bags for ideal storage.