What Is The Most Common Type Of Rock-forming Mineral?

What Is The Most Common Type Of Rock-forming Mineral? The most common rock-forming minerals are silicates (see Vol. IVA: Mineral Classes: Silicates), but they also include oxides, hydroxides, sulfides, sulfates, carbonates, phosphates, and halides (see Vol. IVA: Mineral Classes: Nonsilicates). Why Silicates are the most common rock-forming minerals? Because Oxygen and Silicon are the most