I want to get small amount of Calcium Hydroxide 20g or so.
I had burnt powder of seashell in stove top coil for several minutes, what I got is white color powder. I suspect if it is CaO. The stuff looks like don't react with water, not stick enough after mixing with water, not hardness enough after the mixture dry.
I check handbook, the calcium carbonate decompose temperature is around 825. I don't know if my stovetop coil have enough heat to decompose the seashell. I guess the coil is around 700 to 800 c degree, because it easily melt the aluminum foil.