Mini Me Geology Mineral Observation, Hardness and Streak Testing STEM Kit Includes eight large mineral samples: Talc, Gypsum, Calcite, Fluorite, Apatite, Feldspar, Quartz and Corundum. Samples typically 1-2" in size. Colors of samples may vary. Mini Me Geology Hand Lens with 3x and 6x magnification helps you see your samples closely. Includes one white and one black streak plate. Information cards teach you about your samples and how to perform each test. The perfect STEM geology science kit for scouts, schools, home school and young rock hounds!