Set of 12 rikers

M1: Sedimentary Rocks
M2: Metamorphic Rocks
M3: Igneous Rocks
M4: Industrial Rock & Minerals: Metals
M5: Industrial Rock & Minerals: Household
M6: Industrial Rock & Minerals: Construction
M7: Rock-forming Mineral Groups
M8: Sukucates
M9: Soil Types
M10: Gemstone Minerals
M11: Native Elements
M12: Mineraloids

Prop 65 for some of the metals/minerals