Sandstone known also as arenite is a clastic sedimentary rock composed mainly of sand-sized minerals or rock grains. Most of the sandstones are composed of quartz and/or feldspar (a rock that does not contain minerals with important elements including metals) like sand. The sandstones may be any color, but the most common colors are tan, […]
Limestone
Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate (CaCO3). Many limestones are composed from skeletal fragments of marine organisms such as coral or foraminifera. Limestone contains often variable amounts of silica which is oxide of silicon known by is chemical formula as […]
Marble
The word “marble” derives from the Greek from mármaros, “crystalline rock”, “shining stone”, or perhaps from the verb marmaírō, “to flash, sparkle, gleam”. Marble is a rock resulting from metamorphism of sedimentary carbonate rocks, most commonly limestone or dolomite rock. Metamorphic is derived from the Greek word “meta” denoting a change and “morph” meaning form […]