Which of the following arrows is used for the indication of precipitate formation during a chemical reaction?

$\downarrow$, is the arrow used for the indication of precipitate formation during a chemical reaction.
The precipitate formation of a product is represented by an arrow pointing downwards, whereas an arrow pointing upwards along with a product represents a gaseous product. The precipitate is denser, so it settles down in the mixture and is the insoluble part. As the precipitates settle down in the reaction mixture, it is represented by an arrow pointing downwards($\downarrow$).