Rice husk, a common agricultural waste in Indonesia, can be turned into silica using a simple method called sol-gel. By treating the husk with a specific concentration of KOH for a certain amount of time, researchers were able to extract high-purity silica. The best results were achieved with a 7% KOH solution for 120 minutes, producing amorphous silica with a purity of 95.34%. This silica has similar properties to commercial products and can be used for various purposes. The process also resulted in a high surface area, making the silica highly reactive. Further improvements in the washing process can enhance the purity of the silica extracted from rice husk.