The term mineral is often used to denote any material that occurs naturally in the ground, including oil and natural gas. However, mineralogists and geologists restrict its use to naturally occurring solids having specific chemical compositions. For...

Minerals are inorganic substances that occur in nature. Many minerals are relevant to human nutrition, including water, sodium, potassium, chloride, calcium, phosphate, sulfate, magnesium, iron, copper, zinc, manganese, iodine, selenium, and...

Minerals are the basic materials which make up the earth's crust. Most rocks are combinations of minerals. A mineral can be either a chemical element or a chemical compound and is defined as a natural, inorganic, crystalline solid. Each mineral has its...

Minerals are inorganic substances—for example, CALCIUM, POTASSIUM, SODIUM and ZINC. Traces of these are present in many foods and are essential components of the DIET. Many are essential for proper neural functioning; for instance, see ACTION...

A mineral is a naturally occurring substance formed through geological processes that has a characteristic chemical composition, a highly ordered atomic structure and specific physical properties. A rock, by comparison, is an aggregate of minerals and...

Hundreds came to an interfaith service Sunday in the heart of Utah's coal country to say a public goodbye to six miners who were entombed in a mine after an earthshaking collapse.Gov. Jon Huntsman said he hoped the memorial service would allow the families, who...

More than 20,000 miners from across Bolivia marched into the capital Tuesday, tossing sticks of dynamite that sent booming explosions echoing through the streets in a protest of President Evo Morales' plans for a steep hike in mining taxes.The hard-hatted miners whistled and chanted as...

House-passed legislation orders a government study into the technology needed to overcome the circumstances of miners being trapped far underground without the ability to communicate with would-be rescuers.The bill, approved by voice vote Monday, commissions the National Institute of Standards and Technology to research, develop...

Rescuers raced Saturday to pump water out of two coal mines flooded by a rain-swollen river in eastern China, where 181 miners were missing and feared dead.Water levels were rising, work areas were submerged and the miners "had only slim chances of survival," the official...

Essay discusses various aspects about rocks and minerals.