It is simply mineral residue. It is most likely silica, limestone and magnesium. It is harmless. The chemical compositions are CaCO3 and SiO2 and MgOH2.
I'm pretty sure sugar???
Sanded Grout
Powdery is an adjective which not require any change!You can have a physical change where a large lump of some substance is ground into powder. Or you can have a chemical change (eg magnesium burning) which leaves a powdery residue.
colorless solution or white powder
color change
Pollen
Pollen
Pollen is the fine powdery substance, usually yellow, produced by the male parts of a plant and located on the anthers of seed plants.
The answer is Ash.
Ash
I'm pretty sure sugar???
it is solid,waxy substance i think
Starch Crushed diamond.
Pollen
everything you can thinlk of
Sanded Grout
Pollen is a powdery substance consisting of microscopic grains. Pollen can cause Allergies!