> Just as carbon ash from the fireplace has the same chemical makeup as a diamond AFAIK wood ash is predominantly mineral oxides, particularly of calcium. The

> Just as carbon ash from the fireplace has the same chemical makeup as a diamond AFAIK wood ash is predominantly mineral oxides, particularly of calcium. The carbon in the wood is the fuel that burns up and goes out the chimney as carbon dioxide. When wood burns it first boils and burns off various volatile compounds, leaving behind black charcoal coals, made predominately of carbon. This charcoal also burns, leaving behind wood ash.