Simple physics/ chemistry formula: mass*specific heat*change in
temperature = change in energy. Thus, a material like ceramic pizza
stones with a high mass, and a high specific heat will store up (and
thus release) more heat energy with the same change in temperature than
would just an unmassive, low specific heat item like the casing of your
oven. So like said above, both the mass, and the specific heat are
important in the amount of heat released. Specific heat esentially the
amount of energy required to change a certain amount of material a
certain amount in temperature.