Is there experimental evidence that Silica gel can form the patterns seen in AGATES ?
The chemical reaction that occurs as the gel transforms from a liquid to a solid was defined by two Russian scientists, (Belousov-Zhabotinskii reaction). I will not go into the chemistry just to say that this reaction speeds up and then slows down in waves. In other words it pulses. Each time this process stops and starts again a new band is formed.
