Oxides & hydroxides
Oxides are oxygen compounds. This includes minerals with different properties and the way they are formed and occurred. The most abundant and important are quartz (SiO2), hematite (Fe2O3) and corundum (Al2O3). Many of them are important ores of iron and tin. Others are prized gems (ruby and sapphire). In nature, they are formed by precipitation from melts and solutions. They are often formed by oxygenation during the decomposition of minerals and during the ventilation of rocks (limonite, opal). More info
Oxides are oxygen compounds. This includes minerals with different properties and the way they are formed and occurred. The most abundant and important are quartz (SiO2), hematite (Fe2O3) and corundum (Al2O3). Many of them are important ores of iron and tin. Others are prized gems (ruby and sapphire). In nature, they are formed by precipitation from melts and solutions. They are often formed by oxygenation during the decomposition of minerals and during the ventilation of rocks (limonite, opal).