Gravimetric and volumetric experiments with three Egyptian minerals
Alabaster , "Oriental Alabaster” and Malachit are very useful for quantitative heat decomposition.
Less than than 500 mg of these minerals are needed for weighing, chemical reactions and re-weighing.
v y v a  
                 Alabaster .............................Burning ..."Oriental Alabaster" ... slaking......................................           
x c c
Malachite:decompose and reduce......Malachite: decompose, test for products................... 1 Malachite   2 CuO   ...  3 Cu
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