Primary minerals form at elevated temperatures from cooling magma during the original solidification of rock or during metamorphism, and they are usually derived from igneous and metamorphic rocks ...

Table 1: Common salts found in saline soils. Soils are naturally composed of inorganic minerals, including primary minerals (e.g., quartz, micas, or feldspars) and their weathering products, including ...

The mineral was first used as the main pigment in cave paintings often having a reddish hue, a signature trait of hematite.