* Red, brown, pink: These colors are often caused by iron oxide minerals, such as hematite and limonite.
* Yellow, orange, buff: These colors are often caused by iron hydroxide minerals, such as goethite.
* White, gray, beige: These colors are often caused by quartz, feldspar, or other colorless or light-colored minerals.
* Green: This color is often caused by the presence of glauconite, a green clay mineral.
* 黒： This color can be caused by the presence of organic matter, manganese oxides, or other dark-colored minerals.
砂岩は、さまざまな鉱物の混合物とそれらの配置方法のために、幅広い色合いとパターンを示すことができることに注意することが重要です。 This variety of color makes sandstone a popular building material and a beautiful natural feature.
