What mineral is not a silicate mineral?

Answer 1

A silicate mineral comes from silicates, the most dominant mineral class which accounts for over 90 percent of Earth's crust. Silicates form through the combination of oxygen and silicon, and more than 800 species of silicate minerals have been identified. Silicates include feldspars, quartz, olivine, and more. Yet, to identify a mineral that is not a silicate mineral we must identify the nonsilicate class, which encompass the other mineral classes that are far less abundant than the silicates. They are very important economically and they can be further categorized into carbonates, halides, oxides, sulfides, sulfates, and native elements. Minerals of each of these sub-classes represent minerals that are not a silicate mineral; thus, there are numerous answers to this question. Calcite is not a silicate mineral because it is a carbonate, halite is not because it is a halide, galena is not because it is a sulfide, gypsum is not because it is a sulfate, and gold is not because it is a native element.