No, non-silicate minerals may not contain oxygen. Unlike silicate minerals, which essentially contain silicon and oxygen atoms, non-silicate minerals have different molecular structures. These minerals encompass a diverse range of elements and compounds, including carbonates, sulfides, oxides, halides, and native elements. Examples include calcite (calcium carbonate), pyrite (iron sulfide), magnetite (iron oxide), halite (sodium chloride), and diamond. Each mineral has unique traits based on its chemical composition, and therefore, the inclusion of oxygen in their structure varies.