Which type is silica x for homeopathy?

Silica: Silica is a mineral remedy from the 3rd row of the periodic table. It's sometimes needed in patients who have very low self-confidence, and who long to be seen in a special way by others. They may be very obstinate, yet extremely anxious about details. Silica can also help in certain kinds of pharyngitis, sinusitis, and abscesses. The "x" means a potency on the decimal scale, such as 12x.