Limestone is a sedimentary rock that is, by definition, a rock composed of several smaller rocks. Found in limestone is calcite, dolomite additionally, tiny fossils, shell fragments and other fossilized debris. Colours generally are consistent within limestone from gray to white but may also be yellow or brown. Limestone has several classifications, identifiable by the mineral structure of the stone. Typically limestone is used as a base material for building and architectural applications, decorative trim, and veneer. Naturally, it’s a soft stone, susceptible to weathering and erosion also, sturdy and dense. A five-kilogram bag provides an effective way to identify, study and examine rocks and minerals. It is ideal for classrooms, rock discussions, and classification. 1kg = 60 pieces