seen this experience posted from time to time, so it appears to be 'real'
supposing that the combustion is complete, i.e. no organic residue left, what will the ash consist of?
ought to be much like wood ash, potash, sodium ash, some phosphorus, calcium, ...
these minerals produce white/light colored residues as a rule
dark might imply heavier metals, iron compounds being the most common
don't know for sure, but you could do some chemical tests if so inclined
supposing that the combustion is complete, i.e. no organic residue left, what will the ash consist of?
ought to be much like wood ash, potash, sodium ash, some phosphorus, calcium, ...
these minerals produce white/light colored residues as a rule
dark might imply heavier metals, iron compounds being the most common
don't know for sure, but you could do some chemical tests if so inclined