Limestone would be potentially harder until the clay is fired. The problem we have here is that "clay" is an ambiguous term. There is no homogenous or standard formula for clay. However, clays can generally be formed and baked to become set and hard. This is called firing. Fired clay tends to be quite hard, and depending on the formula, might be harder than limestone.
cement
quick lime is CaO and limestone is CaCO3 and the method to prepare limestone out of quick lime is just heat the limestone. CaCO3--------CaO + CO2 HEAT
It is made from Portland limestone and Wilden clay
== Marl.
Methane is used to heat limestone and clay
Clay does not turn into limestone. Lithified clay is called shale.
Clays would become shale, then metamorphose into slate with heat and pressure.
Clay, it is better on their hooves.
calcium carbonate (limestone)
you make it by mixing limestone powder and clay in a kiln
No, The Sphinx was made of limestone blocks
Limestone, CaCO3 decomposes into quicklime, CaO, and carbon dioxide, CO2, when heated. The reaction is: CaCO3 + heat --> CaO + CO2.
Limestone would be potentially harder until the clay is fired. The problem we have here is that "clay" is an ambiguous term. There is no homogenous or standard formula for clay. However, clays can generally be formed and baked to become set and hard. This is called firing. Fired clay tends to be quite hard, and depending on the formula, might be harder than limestone.
clay + limestone = cement
cement
When you heat clay it turns into a pot